International Journal of Polymer Analysis and Characterization最新文献_第10页

Synthesis and characterization of glyceryl starch and determination of molar substitution 甘油淀粉的合成、表征及摩尔取代的测定

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-08-15 DOI: 10.1080/1023666X.2023.2221873

Xue-Li Liu , Shi-Ye Xu , Jin Yang , Si-Jin Li , Yi-Wen Chen

引用次数: 0

Development and assessment on hemp–carbon–basalt fibre base hybrid composite with organic fillers for structural applications 结构用有机填料大麻-碳-玄武岩纤维基复合材料的开发与评价

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-08-15 DOI: 10.1080/1023666X.2023.2221483

Sudhakar Uppalapati , J. Bensam Raj , N. Natarajan , M. Adam Khan

{"title":"Development and assessment on hemp–carbon–basalt fibre base hybrid composite with organic fillers for structural applications","authors":"Sudhakar Uppalapati , J. Bensam Raj , N. Natarajan , M. Adam Khan","doi":"10.1080/1023666X.2023.2221483","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2221483","url":null,"abstract":"<div><p>Hybrid composites are in increasing demand for structural applications. The created composite material is anticipated to possess fundamental qualities and a typical load-bearing capacity. The development of a hybrid composite hemp-epoxy polymer material with carbon and/or basalt fiber reinforcement is proposed in this study. With carbon fiber at 6%, basalt fiber at 6%, and carbon-basalt at 2 + 4% in the reinforcement, the weight percentage of the fiber reinforcement was altered for 15, 20, and 25% of hemp fiber in the composite. Additionally, natural fillers like coconut shell powder and calcium carbonate were incorporated into the matrix material. To create the composite with various combinations of fiber reinforcement, industrial standards processes were followed. In comparison to other compositions, the hemp-carbon fiber sample (A3) has a maximum strength of 104 MPa. The same composition also has a maximum stiffness of 197 N/mm, which may be attributed to the matrix material’s high bonding strength (67 weight percent). The shore hardness of the hemp-carbon fiber composite is likewise at its highest, falling between 90 and 98 on the hardness scale. The results revealed that composites composed of carbon and hemp fibers have superior mechanical characteristics to basalt fiber reinforcement. To investigate the material behavior, an electron microscope will be used to examine the cracked surfaces. The material will be suggested for use in structural applications based on the findings.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 4","pages":"Pages 383-395"},"PeriodicalIF":1.9,"publicationDate":"2023-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49867066","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

Characterization of natural cellulosic fibers from the bark of the Edgeworthia chrysantha plant 菊花树皮天然纤维素纤维的特性

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-08-12 DOI: 10.1080/1023666X.2023.2217559

Yuying Xiao , Hailong Li , Menglan Yu , Lisheng Shi , Jingshan Zeng , Mengru Liu

{"title":"Characterization of natural cellulosic fibers from the bark of the Edgeworthia chrysantha plant","authors":"Yuying Xiao , Hailong Li , Menglan Yu , Lisheng Shi , Jingshan Zeng , Mengru Liu","doi":"10.1080/1023666X.2023.2217559","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2217559","url":null,"abstract":"<div><p>In this paper, the structural, morphological, and mechanical properties of <em>Edgeworthia chrysantha</em> phloem fibers are characterized. The chemical composition of <em>Edgeworthia chrysantha</em> mainly includes cellulose (47.13%), hemicelluloses (15.20%), and lignin (7.30%). X-ray diffraction analysis shows that <em>Edgeworthia chrysantha</em> phloem fiber has high crystallinity (76.38%) and small grain size (3.13 nm). Thermogravimetric analysis shows that the maximum degradation temperature of <em>Edgeworthia chrysantha</em> phloem fiber is 351 °C. The results of scanning electron microscopy and atomic force microscopy show that <em>Edgeworthia chrysantha</em> phloem fiber has an obvious hierarchical structure and a relatively rough surface. Additionally, the elastic modulus (6.04–15.21 GPa) and hardness (0.17–0.88 GPa) of <em>Edgeworthia chrysantha</em> phloem fiber were measured by nanoindentation. The result provided a theoretical basis for the high-value application of <em>Edgeworthia chrysantha</em> phloem fibers, especially in papermaking, textiles, fiber-reinforced material and other applications.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 4","pages":"Pages 341-350"},"PeriodicalIF":1.9,"publicationDate":"2023-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49866715","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

Mutual influence of the morphology and growth kinetics in binary crystalline blends of poly(butylene terephthalate) and polyarylate 聚对苯二甲酸丁二酯和聚芳酯二元结晶共混物的形态和生长动力学的相互影响

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-08-08 DOI: 10.1080/1023666X.2023.2217560

Wei-Chi Lai , Shih-Huang Tung , Wen-Bin Liau

{"title":"Mutual influence of the morphology and growth kinetics in binary crystalline blends of poly(butylene terephthalate) and polyarylate","authors":"Wei-Chi Lai , Shih-Huang Tung , Wen-Bin Liau","doi":"10.1080/1023666X.2023.2217560","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2217560","url":null,"abstract":"<div><p>The spherulitic morphology and crystallization behaviors of binary crystalline blends of poly(butylene terephthalate) (PBT) and polyarylate (PAr), based on bisphenol A, (27:73 isophthalic:terephthalic acids), are investigated herein. PBT and PAr crystallize simultaneously or sequentially; various crystallization behaviors and morphologies are observed. In the PBT-rich blends, PAr does not crystallize; the PBT spherulites coarsen as the PAr concentration increases. Non-crystallizable PAr is trapped inside the spherulites. The PBT spherulitic growth rate decreases when PAr is added and remains constant thereafter. For the 50/50 blends, PBT and PAr crystallize simultaneously, and their spherulites co-exist separately. The spherulitic growth rate of PBT increases with time while PAr is crystallizing, but it remains constant if PAr crystallizes prior. At a crystallization temperature of 250 °C, only PAr crystallizes; the non-crystallizable PBT is expelled from the PAr spherulites because the crystallization rate of PAr is low. The spherulites of PAr do not fill the space in the final crystallization stage. The crystallization rate of the binary crystalline PBT/PAr blends was notably influenced by the prior crystallization of the other component, and was due to the change of the amorphous composition in addition to the constraints of the crystals on the chain mobility.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 4","pages":"Pages 351-365"},"PeriodicalIF":1.9,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49866708","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: 1

Performance improvement of a modified copolymer as an antiscalant and microbial growth inhibitor 改性共聚物抗垢剂和微生物生长抑制剂的性能改进

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-08-08 DOI: 10.1080/1023666X.2023.2212565

Fatemeh Karchoubi , Mahsa Baghban Salehi , Reza Panahi , Shahriar Salemi Parizi

{"title":"Performance improvement of a modified copolymer as an antiscalant and microbial growth inhibitor","authors":"Fatemeh Karchoubi , Mahsa Baghban Salehi , Reza Panahi , Shahriar Salemi Parizi","doi":"10.1080/1023666X.2023.2212565","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2212565","url":null,"abstract":"<div><p>Prevention and control of calcium sulfate scale formation and microbial growth accumulation in water handling systems is one of the challenging operations to avoid corrosion and flow restriction through equipment. This paper examines modified low-molecular-weight Maleic Anhydride (MAn) copolymerized by Acrylamide (AAm), which was successfully synthesized, developed, and analyzed as a multifunctional non-phosphorous antiscalant to overcome these problems. The structure, morphology, and thermal property of poly(MAn-co-AAm) were characterized. The intended structure and copolymerization were confirmed through GPC, FT-IR, SEM, and EDX analyses. The high thermal resistivity up to 400°C was observed via TGA analysis. The standard NACE TM0374 methodologies were applied to evaluate the scale controlling capacity of poly(MAn-co-AAm) at various dosages (1–20 ppm), temperatures (50–90 °C), and regular intervals of 24–72 h. Interestingly, for low values of poly(MAn-co-AAm), efficiency was found 100% at the third level within the standard state. Further SEM and XRD analyses emphasized the validity of successful inhibition of calcium sulfate scale formation in comparison with other antiscalant agents, even at very low concentrations. In addition, antibacterial properties of poly(MAn-co-AAm) were investigated against <em>Staphylococcus aureus (S. aureus)</em> and <em>Escherichia coli (E. coli)</em>. The results revealed that the developed copolymer possesses a wide antibacterial activity against both Gram-negative and Gram-positive bacteria. With this in mind, poly(MAn-co-AAm) is believed to be an effective and economical multifunctional antiscalant in cooling water treatment systems.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 4","pages":"Pages 325-340"},"PeriodicalIF":1.9,"publicationDate":"2023-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49866716","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

Structure and properties of aromatic naphthalene thermotropic liquid crystal copolyester/MWCNT composites 芳烃萘热致液晶共聚酯/MWCNT复合材料的结构与性能

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-08-04 DOI: 10.1080/1023666X.2023.2211727

Peng Wei , Zhiqiang Li , Yanan Zhang , Yumin Xia , Yanping Wang , Yimin Wang

{"title":"Structure and properties of aromatic naphthalene thermotropic liquid crystal copolyester/MWCNT composites","authors":"Peng Wei , Zhiqiang Li , Yanan Zhang , Yumin Xia , Yanping Wang , Yimin Wang","doi":"10.1080/1023666X.2023.2211727","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2211727","url":null,"abstract":"<div><p>Aromatic naphthalene thermotropic liquid crystal copolyesters (N-TLCP) have strong intermolecular forces and possess excellent comprehensive properties. In this study, the N-TLCP/MWCNT nanocomposites derived from 6-hydroxy-2-naphthoic acid (HNA), 2,6-naphthalene dicarboxylic acid (NDA), terephthalic acid (TA), 4,4′-dihydroxy biphenyl (BP) and carboxyl MWCNT were prepared via in situ “one-pot” melt polymerization method. The structure and properties of N-TLCP/MWCNT composites were fully analyzed. The interaction between MWCNT and TLCP matrix was confirmed by FTIR, XPS, Raman spectrum and rheometric measurements; and the strong interaction was observed for addition of a small amount of MWCNT (<0.5 wt%), which was attributed to the fact that the functional group COOH on the surface of MWCNTs enhances the dispersion state of the CNTs and molecular interaction through hydrogen bond/chemical covalent bonds. As a result, the glass transition temperature, melting temperature, thermal stability and mechanical properties of the N-TLCP/MWCNT composite was improved. However, more addition of MWCNT would tend to aggregate and impact the molecular weight and structure of the N-TLCP by the chemical reaction between its COOH group and OH group of the N-TLCP, which is not favor for improving the mechanical properties.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 4","pages":"Pages 293-306"},"PeriodicalIF":1.9,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49866717","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

Investigate the effect of short chain branching and lamellar thickness on mechanical and optical properties of linear low-density polyethylene by successive self-nucleation/annealing (SSA) technique 采用连续自成核/退火(SSA)技术研究了短链分支和片层厚度对线性低密度聚乙烯力学和光学性能的影响

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-05-16 DOI: 10.1080/1023666X.2023.2212344

Shirin Saleki , Nasrin Khorshidi

引用次数: 1

Morphological, structural, electrical impedance, and equivalent circuit analysis of polypyrrole/barium substituted lanthanum manganite (La0.7Ba0.3MnO3) perovskite nanocomposites 聚吡啶/钡取代锰酸镧(La0.7Ba0.3MnO3)钙钛矿纳米复合材料的形态、结构、电阻抗和等效电路分析

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-04-01 DOI: 10.1080/1023666X.2023.2201083

Smitha M. G. , Sandeep Kumar H. L. , Shwetha

{"title":"Morphological, structural, electrical impedance, and equivalent circuit analysis of polypyrrole/barium substituted lanthanum manganite (La0.7Ba0.3MnO3) perovskite nanocomposites","authors":"Smitha M. G. , Sandeep Kumar H. L. , Shwetha","doi":"10.1080/1023666X.2023.2201083","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2201083","url":null,"abstract":"<div><p>The article presents the impedance analysis of polypyrrole (PPy)/La<sub>0.7</sub>Ba<sub>0.3</sub>MnO<sub>3</sub> (LBM) nanocomposites synthesized by in situ chemical oxidation method. The morphology and crystal structure were analyzed by Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD) techniques. Vibration modes were analyzed using Fourier Transform Infrared spectroscopy (FTIR). The impedance behavior of the compounds was studied using an impedance analyzer in the frequency (100 Hz − 5 MHz) and temperature (30°C − 90 °C) variation mode. Results of SEM and TEM for PPy, LBM, and PPy-LBM nanocomposites show spherical, rhombic and granular structures respectively. FTIR shows the presence of respective elements to be present for the formation of PPy, LBM, and PPy-LBM compounds. XRD patterns of PPy, LBM, and PPy-LBM nanocomposites show amorphous, orthorhombic, and semicrystalline phases respectively. The Real part of impedance shows decreasing value with frequency and the imaginary part of impedance shows the relaxing nature of the compounds. Cole − Cole analysis reveals the resistance contribution from grains and grain boundary. The equivalent circuit elucidated gives the combination of resistor and capacitor being parallel along with constant phase element and Warburg effects. The study helps us to understand the electric behavior of the samples whether capacitive or resistive type for which further studies can be conducted for sensor, anticorrosion coating, and spintronic applications.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 3","pages":"Pages 241-255"},"PeriodicalIF":1.9,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49880429","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

Development of visible-light driven photo-switching copolymers with pH indicating performance 具有pH指示性能的可见光驱动光开关共聚物的研制

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-04-01 DOI: 10.1080/1023666X.2023.2202974

Xiaohong Hu , Weiwei Jin , Haitao Zhang , Qinyu Qing , Juan Pang

{"title":"Development of visible-light driven photo-switching copolymers with pH indicating performance","authors":"Xiaohong Hu , Weiwei Jin , Haitao Zhang , Qinyu Qing , Juan Pang","doi":"10.1080/1023666X.2023.2202974","DOIUrl":"https://doi.org/10.1080/1023666X.2023.2202974","url":null,"abstract":"<div><p>Visible-light-driven azobenzene had been reported by theoretical calculation, but could not be detected by any characterization method due to unstable cis structure. Herein, copolymerization was applied to solve the problem based on a time-dependent characteristic of macromolecular motion. Therefore, two copolymers, namely, MRAA-PEG<sub>20</sub> copolymer and MRAA-NIPAM copolymer, were synthesized with a definite segment ratio. Both copolymers had photosensitive groups, which were confirmed by UV-vis spectra. Furthermore, copolymer concentration had a linear relationship with absorbance value at 425 nm. Firstly, blue light as an excitation source to induce the isomerization of copolymers. At the same time, repeated interval irradiation was used to evaluate the fatigue performance of the copolymer. Consequently, both copolymers could quickly transform to their cis isomers upon irradiation, which could be reversible recovered to their trans isomers in operable recovery time after removing irradiation. However, the MRAA-PEG<sub>20</sub> copolymer had an obvious photobleaching phenomenon along with the circle index, which did not exist in the MRAA-NIPAM copolymer. Secondly, the effects of excitation light source on isomerization were investigated. It was found that blue light was the most efficient excitation source for both copolymers though other light could also induce trans-to-cis transition. Thirdly, the influence of light intensity and temperature was respectively studied. With increasing of light intensity, the absorbance ratio before and after irradiation monotonously decreased, the irradiation response time shortened and the recovery response time prolonged. Moreover, higher temperature resulted in a higher absorbance ratio, shorter irradiation response time, and shorter recovery response time. Finally, synthesized copolymers had characteristic of pH indicator with a critical point of pH 5.0.</p></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"28 3","pages":"Pages 256-268"},"PeriodicalIF":1.9,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49880428","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

Preparation of functional coating films using breath figure (BF) method and the study of morphological, optical and wettability behavior with varying experimental conditions 呼吸图(BF)法制备功能性涂膜及其在不同实验条件下的形态学、光学和润湿性研究

IF 1.9 4区工程技术

International Journal of Polymer Analysis and Characterization Pub Date : 2023-04-01 DOI: 10.1080/1023666X.2023.2175167

Andrés Boulett , Oscar Marambio , Rudy Martin-Trasanco , Julio Sánchez , Wilson Alavia , Diego P. Oyarzún , Guadalupe Pizarro

引用次数: 0