International Journal of Polymer Analysis and Characterization最新文献_第6页

Polyamide 66/poly(2,6-dimethyl-1,4-phenylene oxide) compatibilization with styrene–acrylonitrile–glycidyl methacrylate: rheology, morphology, and mechanical properties 聚酰胺 66/聚（2,6-二甲基-1,4-苯基氧化物）与苯乙烯-丙烯腈-甲基丙烯酸缩水甘油酯相容：流变学、形态学和机械性能

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2024-02-17 DOI: 10.1080/1023666X.2024.2318518

Yun Zhang , Xinyu Dai , Di Yang , Shaohui Guo , Jinming Yang

{"title":"Polyamide 66/poly(2,6-dimethyl-1,4-phenylene oxide) compatibilization with styrene–acrylonitrile–glycidyl methacrylate: rheology, morphology, and mechanical properties","authors":"Yun Zhang , Xinyu Dai , Di Yang , Shaohui Guo , Jinming Yang","doi":"10.1080/1023666X.2024.2318518","DOIUrl":"10.1080/1023666X.2024.2318518","url":null,"abstract":"<div><p>During the blending process, styrene–acrylonitrile–glycidyl methacrylate (SAG) was grafted through <em>in-situ</em> formation of polyamide 66 (PA66) as a compatibilizer for poly (2,6-dimethyl-1,4-phenoxy) (PPO) composites. SAG has an obvious advantage over the PA66/PPO blends in terms of terminal performance in the dynamic rheological analysis. Moreover, the gap between the PA66 and PPO glass-transition temperatures decreases with the SAG content increasing, which indicates improved compatibility. The particle morphology of the PA66/PPO/SAG blends had narrower size distributions and became smaller after adding SAG. In addition, the compatibilization improved the mechanical properties of blends significantly when SAG reached 5 by weight per hundred resins (phr). This is attributed to enhanced interfacial adhesion and a finer dispersion morphology. However, when 7 phr of SAG are added, the exceeded compatibilizer produces a limitation on the improvement of the mechanical properties. Our results indicate that the optimal concentration of the compatibilizer, SAG, is between 3 and 5 phr for PA66/PPO (60/40).</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"29 2","pages":"Pages 98-108"},"PeriodicalIF":1.9,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140034326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of silicone foam/polytitanosiloxane composite with enhanced flame retardancy 制造阻燃性更强的硅泡沫/聚钛硅氧烷复合材料

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2024-02-17 DOI: 10.1080/1023666X.2024.2311452

Weining Du , Chaolu Yin , Hao Huang , Xinguo Ge

{"title":"Fabrication of silicone foam/polytitanosiloxane composite with enhanced flame retardancy","authors":"Weining Du , Chaolu Yin , Hao Huang , Xinguo Ge","doi":"10.1080/1023666X.2024.2311452","DOIUrl":"10.1080/1023666X.2024.2311452","url":null,"abstract":"<div><p>In this research, a series of silicone foam/polytitanosiloxane composites (SF-pTS) were fabricated with hydroxy-, vinyl-, hydrogen-containing polydimethylsiloxanes, and polytitanosiloxane filler in the presence of a platinum catalyst under ambient conditions. The effect of the amount of polytitasiloxane on the micromorphology and flame retardancy of silicone foam was studied, and a relative flame retardancy mechanism was proposed. It could be found that the polytitanosiloxane exhibited a good dispersion level in the silicone foam, thus improving the flame retardancy of the composite. When the content of polytitanosiloxane is 9 wt%, the limiting oxygen index and UL-94 grade of the SF-pTS9 composite are increased to 29.2% and FV-0, respectively. Cone experiment results suggested that the SF-pTS9 possessed relative balanced PHRR (148.9 kW/m<sup>2</sup>), THR (58.5 MJ/m<sup>2</sup>), TSP (0.6 m<sup>2</sup>), and mass residue (83.9%) among the prepared silicone foam materials. This work provides a new avenue to fabricate a silicone foam composite with enhanced flame retardancy.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"29 2","pages":"Pages 75-85"},"PeriodicalIF":1.9,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139754346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Infill strategies for improving the impact behavior of polymer composites utilizing statistical and thermal analysis 利用统计和热分析改善聚合物复合材料冲击行为的填充策略

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2024-02-17 DOI: 10.1080/1023666X.2024.2319404

Tapish Raj , Akash Jain , Abhishek Raj , Bobby Tyagi , Ankit Sahai , Rahul Swarup Sharma

{"title":"Infill strategies for improving the impact behavior of polymer composites utilizing statistical and thermal analysis","authors":"Tapish Raj , Akash Jain , Abhishek Raj , Bobby Tyagi , Ankit Sahai , Rahul Swarup Sharma","doi":"10.1080/1023666X.2024.2319404","DOIUrl":"10.1080/1023666X.2024.2319404","url":null,"abstract":"<div><p>The emergence of additive manufacturing has enabled scientists to efficiently construct complex geometric forms, facilitating the creation of robust structures with enhanced resistance to external forces. Fused filament fabrication (FFF) enables the attainment of personalization, enhanced design flexibility, waste reduction, expedited prototyping, and the generation of intricate profiles. In this study, an impact test was conducted to measure the energy absorption of polymer composites fabricated through fused filament deposition. Specifically, the composites investigated were poly-lactic acid reinforced with multi-walled carbon nanotubes, carbon fibers, and graphene. The study examined the effects of different infill patterns and infill densities on the energy absorption capabilities of these composites. The utilization of a gyroid infill pattern with a 100% infill density has been found to demonstrate the highest level of energy absorption in the context of graphene-reinforced poly-lactic acid. In order to examine the relationship between the given process parameters and the energy-absorbing behavior, an analysis of variance using Taguchi’s approach is employed on the impact test findings. The examination of fractured surfaces using scanning electron microscopy (SEM) unveiled several types of voids, exhibiting enhanced interlayer adhesion in distinct composite materials. The thermal characteristics of the composite material were determined by the utilization of differential scanning calorimetry (DSC) analysis. The experimental results demonstrate that polymer composites have future potential to be employed in automotive parts that necessitate high impact resistance, such as the fabrication of bumpers and body panels.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"29 2","pages":"Pages 109-126"},"PeriodicalIF":1.9,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140008574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of extension speed on the mechanical performance of sisal and coir fiber bundles 延伸速度对剑麻和棕纤维束机械性能的影响

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2024-02-17 DOI: 10.1080/1023666X.2024.2316966

Achille Désiré Betené Omgba , Julien Clerc Obam , Seydou Youssoufa , Paul William Huisken Mejouyo , Remy Legrand Ndoumou Belinga , Olive Djuidje , Eric Ndjem Eyike , Fabien Betené Ebanda , Atangana Ateba

{"title":"Effect of extension speed on the mechanical performance of sisal and coir fiber bundles","authors":"Achille Désiré Betené Omgba , Julien Clerc Obam , Seydou Youssoufa , Paul William Huisken Mejouyo , Remy Legrand Ndoumou Belinga , Olive Djuidje , Eric Ndjem Eyike , Fabien Betené Ebanda , Atangana Ateba","doi":"10.1080/1023666X.2024.2316966","DOIUrl":"10.1080/1023666X.2024.2316966","url":null,"abstract":"<div><p>Quasi-static tensile tests are commonly used to determine the mechanical properties of fiber bundles. These tests are generally carried out at a low standard speed of 1 mm.min<sup>−1</sup>, which is recommended for elementary fibers, although other moderate and high speeds are rarely used. In this study, tensile tests were carried out on coir and sisal fiber bundles from the coastal region of Cameroon using four different speeds: 1, 2, 5, and 10 mm.min<sup>−1</sup> to assess mechanical properties. Samples were prepared by attaching the two ends of each randomly selected fiber bundle to a paper frame to obtain a length of 30 mm. The results showed a significant effect of extension speed, indicating a decrease in tensile strength and Young’s modulus, and an increase in strain at break with increasing speed. These trends were correlated with the power functions. A strong dependence between fiber bundle diameter and tensile strength was also observed. Furthermore, statistical analysis based on the Weibull distribution highlighted the dispersion of mechanical properties, demonstrating a reduction in dispersion with increasing extension speed for coir fibers. These data can be used to develop specific standards for these natural fibers and contribute to the advancement of composites based on plant fibers.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"29 2","pages":"Pages 86-97"},"PeriodicalIF":1.9,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140008565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis, characterization and analysis of conducting polymer composites toward dye adsorption 面向染料吸附的导电聚合物复合材料的合成、表征和分析

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2024-02-17 DOI: 10.1080/1023666X.2024.2323317

Norhabibah Mohamad , Noordini M. Salleh , Habibun Nabi Muhammad Ekramul Mahmud

{"title":"Synthesis, characterization and analysis of conducting polymer composites toward dye adsorption","authors":"Norhabibah Mohamad , Noordini M. Salleh , Habibun Nabi Muhammad Ekramul Mahmud","doi":"10.1080/1023666X.2024.2323317","DOIUrl":"10.1080/1023666X.2024.2323317","url":null,"abstract":"<div><p>The present effort reports on the synthesis of novel and recyclable polymer-based adsorbents based on polypyrrole (PPy) and polyethyleneimine (PEI) for the removal of cationic crystal violet (CV) dye from aqueous solutions. The characterization of the composites was determined by FTIR, XRD, FESEM, and XPS techniques. The effects of different variables on the adsorption of crystal violet dye were studied, including the pH, adsorbent doses, and contact time. The research findings show that the different oxidants used to prepare polypyrrole in PPy-PEI adsorbents play a vital role in CV dye adsorption. The PPy-PEI composite prepared by using the ammonium persulfate oxidant was found to exhibit the highest adsorption of 70.9% among the three different oxidants, namely, anhydrous ferric chloride, ferric chloride hexahydrate, and ammonium persulfate. The ideal adsorption conditions for the removal of CV dye were discovered using an adsorbent dosage of 0.3 g at pH 11, with a contact time of 180 min. Kinetic regression analysis indicated that the adsorption processes followed the pseudo-second order kinetic model and fit well with the Langmuir isotherm, with a maximum monolayer sorption capacity of 142.86 mg/g at a temperature of 27 °C. In addition, the regeneration of the PPy-PEI composite was accomplished with dye adsorption efficiency decreasing from 70.9% to 64.4% after three adsorption-desorption cycles. The present work suggests that the PPy-PEI composite is a promising adsorbent for removing cationic CV dye in aqueous solutions.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"29 2","pages":"Pages 127-145"},"PeriodicalIF":1.9,"publicationDate":"2024-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140107622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of principal component regression (PCR) and partial least square regression (PLSR) modeling methods for quantifying polyethylene (PE) in recycled polypropylene (rPP) with near-infrared spectrometry (NIR) 利用近红外光谱法 (NIR) 对再生聚丙烯 (rPP) 中的聚乙烯 (PE) 进行量化的主成分回归 (PCR) 和偏最小二乘回归 (PLSR) 建模方法的比较

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2024-01-02 DOI: 10.1080/1023666X.2024.2306428

Pixiang Wang , Ke Zhan , Xueqi Wang , Yucheng Peng , Haixin Peng , Yifen Wang , Shaoyang Liu

{"title":"Comparison of principal component regression (PCR) and partial least square regression (PLSR) modeling methods for quantifying polyethylene (PE) in recycled polypropylene (rPP) with near-infrared spectrometry (NIR)","authors":"Pixiang Wang , Ke Zhan , Xueqi Wang , Yucheng Peng , Haixin Peng , Yifen Wang , Shaoyang Liu","doi":"10.1080/1023666X.2024.2306428","DOIUrl":"10.1080/1023666X.2024.2306428","url":null,"abstract":"<div><p>Recycled polypropylene (rPP) often contains a small amount of polyethylene (PE). Since polypropylene (PP) and PE are incompatible, the presence of PE compromises the performance of rPP materials and needs to be closely monitored. In our previous work, Raman and near-infrared (NIR) spectrometries were evaluated to monitor PE content in rPP with partial least square regression (PLSR) modeling. The NIR spectrometry exhibited a wider application range, but the accuracy of the prediction models might be further improved. In the current work, a different modeling method, principal component regression (PCR) was employed to analyze PE content in rPP with NIR spectrometry. Spectrum pretreatment methods, including multivariate scatter correction (MSC), standard normal variate transformation (SNV), smoothing, and first derivative, were investigated to improve the NIR spectrum quality. Forward and backward interval methods were used to optimize spectral range selection. The outcomes were compared with our previous PLSR modeling results. The highest accuracy in independent validation was achieved by a PCR model with an <em>R</em><sup>2</sup> of 0.9991 and a root-mean-square error of prediction (RMSEP) of 0.1596 PE%. On the other hand, a PLSR model achieved the lowest RMSEP of 0.9712 PE% for a non-colored post-consumer rPP sample. The PCR models might be sensitive to interference and more suitable for post-industrial materials, which have a simpler chemical composition. The PLSR models might have better stability and be more suitable for complicated post-consumer samples. Both the PCR and PLSR models were successfully applied to a gray commercial rPP sample.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"29 1","pages":"Pages 56-63"},"PeriodicalIF":1.9,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139578086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new method for selecting and evaluating the hyperelastic model of tread rubber material under rolling contact condition 选择和评估滚动接触条件下胎面橡胶材料超弹性模型的新方法

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2024-01-02 DOI: 10.1080/1023666X.2023.2300904

Xueliang Gao , Yingming Wang

{"title":"A new method for selecting and evaluating the hyperelastic model of tread rubber material under rolling contact condition","authors":"Xueliang Gao , Yingming Wang","doi":"10.1080/1023666X.2023.2300904","DOIUrl":"10.1080/1023666X.2023.2300904","url":null,"abstract":"<div><p>The selection and evaluation of the hyperelastic model of tread rubber material were of great value and significance to the clarification and application of the mechanical properties of tread rubber material. In this article, a non-contact tread rubber material rolling test bench was established. The improved digital image correlation method was used to calculate the strain rate distribution of the marked point under different test conditions. Combined with the stress distribution of the marked point, the rolling dynamic stress-strain characteristics of tread rubber material were obtained. Based on rubber material models under different tensile test modes, the parameter inversion identification of the hyperelastic model was completed, and the influence of the tensile test mode on the parameter inversion of the tread rubber hyperelastic model was revealed. A new method for selecting and evaluating the hyperelastic model of tread rubber material under rolling contact conditions was proposed. The selection criterion for the hyperelastic model of tread rubber material was developed under different rolling conditions. The experimental and analytical results show that the nonlinear degree of the constitutive relation of the hyperelastic model decreased with the increase in rolling speed. Compared with hyperelastic models under different tensile modes, the fitting error of the Yeoh model was less than 3%, and the overall fitting error of the Yeoh model was less than 2%. Therefore, the Yeoh model had better stability and accuracy and was more suitable for describing the rolling mechanical properties of tread rubber under rolling contact conditions.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"29 1","pages":"Pages 15-41"},"PeriodicalIF":1.9,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139483060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of maleic anhydride-modified chitosan as filler reinforced PBAT composite film 评估马来酸酐改性壳聚糖作为填料增强 PBAT 复合薄膜的效果

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2024-01-02 DOI: 10.1080/1023666X.2024.2310327

Pan Xingyu , Xuping Yang , Li Xujuan

{"title":"Evaluation of maleic anhydride-modified chitosan as filler reinforced PBAT composite film","authors":"Pan Xingyu , Xuping Yang , Li Xujuan","doi":"10.1080/1023666X.2024.2310327","DOIUrl":"10.1080/1023666X.2024.2310327","url":null,"abstract":"<div><p>In this article, maleic anhydride (MA) was used to graft-modify chitosan (CS) to obtain maleic anhydride-modified chitosan (MCS). Composite films with different ratios were prepared by melt blending-extrusion pelletizing-blown film using Poly (butylene adipate-co-terephthalate) (PBAT) as the substrate and CS or MCS as the filler. These films can be utilized in a variety of ways, such as food packaging, agricultural mulching film, and more. The composite films were characterized and tested by a Fourier transform infrared (FTIR) spectrometer, thermogravimetric (TG) analysis, differential scanning calorimetry (DSC), scanning electron microscope (SEM), and electronic universal testing machine, and the effects of different fillers and filler contents on the properties of the composite films were investigated. The results showed that the thermal stability of the composite films decreased slightly with the increase in filler ratio, the melt crystallization temperature increased and then decreased, and the tensile strength and elongation at break of the composite films decreased. Compared with unmodified CS, MCS had better dispersion and compatibility when blended with PBAT, and the interaction between MCS and PBAT was greater than that of CS. The optimal filler amount of MCS was 6% for the combination of film material cost and performance considerations.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"29 1","pages":"Pages 64-74"},"PeriodicalIF":1.9,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139903322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Moisture diffusion analysis and their effects on the mechanical properties of organic particle filled natural fiber reinforced hybrid polymer composites 水分扩散分析及其对有机颗粒填充天然纤维增强混合聚合物复合材料机械性能的影响

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2024-01-02 DOI: 10.1080/1023666X.2023.2301271

Sujin Jose Arul , Priyabatra Adhikary , Jani S. P. , A. Haiter Lenin

{"title":"Moisture diffusion analysis and their effects on the mechanical properties of organic particle filled natural fiber reinforced hybrid polymer composites","authors":"Sujin Jose Arul , Priyabatra Adhikary , Jani S. P. , A. Haiter Lenin","doi":"10.1080/1023666X.2023.2301271","DOIUrl":"10.1080/1023666X.2023.2301271","url":null,"abstract":"<div><p>This investigation explores the water intake characteristics of hybrid composite samples composed of Wood Dust as organic filler (WD), Prosopis Juliflora as fiber (PJF), and epoxy as matrix. The specimens underwent immersion in both distilled and seawater environments for a duration of 240 hours. The composite samples, with compositions of 10WD + 30PJF + 60 PF, 20WD + 20PJF + 60 PF, and 30WD + 10PJF + 60 PF, were subjected to moisture content measurements at different intervals. Mechanical properties were tested following ASTM standards for both dry and wet conditions. Results indicate that seawater immersion leads to higher moisture absorption compared to distilled (condensed) water, with the fiber (PJF)-rich composite (30PJF +10WD + 60 PF) exhibiting the greatest water absorption. The water absorption pattern exhibited by the hybrid composite of WD/PJF/PF does not adhere to a Fickian behavior. Tensile, flexural, and impact properties were evaluated, with the (10WD + 30PJF + 60 PF) specimen showcasing superior performance in dry conditions, boasting a tensile character of 51 MPa, flexural (bending) strength of 60 MPa, and impact value of 1.4 KJ/m<sup>2</sup>. However, its strength diminishes upon exposure to distilled water and seawater. SEM analysis of fractured surfaces from seawater-exposed specimens provides additional insights. In conclusion, this study sheds light on the influence of immersion on moisture absorption and mechanical properties, emphasizing the prevalence of non-Fickian behavior and the varying performance of different compositions, with the (10WD + 30PJF + 60 PF) composition demonstrating remarkable strength under dry conditions.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"29 1","pages":"Pages 42-55"},"PeriodicalIF":1.9,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139754288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of NaIO4 treatment on the chemical and physical properties of polyacrylonitrile fibers NaIO4 处理对聚丙烯腈纤维化学和物理特性的影响

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2024-01-02 DOI: 10.1080/1023666X.2023.2295630

Hongqiang Zhu , Yatian Chen , Bin He , Qiufei Chen , Hamza Malik , Yuhang Wang , Jian He , Bomou Ma , Xueli Wang , Hui Zhang , Yong Liu

{"title":"Effects of NaIO4 treatment on the chemical and physical properties of polyacrylonitrile fibers","authors":"Hongqiang Zhu , Yatian Chen , Bin He , Qiufei Chen , Hamza Malik , Yuhang Wang , Jian He , Bomou Ma , Xueli Wang , Hui Zhang , Yong Liu","doi":"10.1080/1023666X.2023.2295630","DOIUrl":"10.1080/1023666X.2023.2295630","url":null,"abstract":"<div><p>Polyacrylonitrile (PAN) fiber modification can promote the stabilization efficiency and mechanical properties of the subsequent carbon fibers; however, it could cause damage to the fibers to some extent. In this article, the effects of NaIO<sub>4</sub> treatment on the chemical and physical properties of PAN fibers were investigated. After NaIO<sub>4</sub> modification, the cyclization reaction has partially occurred, owing to the FTIR revealed that the C≡N peak was weakened, but the C=N stretching vibration peak, the –N = C=O stretching vibration peak, the C=O stretching vibration absorption peak, and the short sequence conjugate C=N characteristic peak were enhanced simultaneously, indicating a successful cyclization and dehydrogenation reaction. Moreover, owing to more oxygen-containing functional groups successfully attached to the PAN fibers and the cyclization reaction taking place, the initial temperature, peak temperature, and heat release of cyclization decreased, which means a more efficient and safer stabilization process. X-ray diffraction (XRD) showed that the (100) crystal plane microcrystal size was the smallest at 40 °C of the modification temperature, whereas the (002) crystal plane microcrystal size was the largest at 60 °C. The modified stabilized PAN fibers presented lower crystallinity and a more aromatic structure compared with untreated fibers. Raman spectra revealed a significant increase in the intensity of the G peak after NaIO<sub>4</sub> modification; the <em>R</em>-value decreased from 1.65 to 1.43, demonstrating a transformation of the sp<sup>3</sup> hybrid carbon structure into a more graphite-like sp<sup>2</sup> hybrid C=C structure. Meanwhile, scanning electron microscopy (SEM) images disclosed additional grooves and cracks on the fiber surface after modification.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"29 1","pages":"Pages 1-14"},"PeriodicalIF":1.9,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139410737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0