Polymer International最新文献

Correction to “Special issue: visionary polymer research for a better world. The professor R.G. ‘Dick’ Jones commemorative issue” 更正为“特刊：为更美好的世界而进行的富有远见的聚合物研究。R.G.‘Dick’Jones教授纪念刊”

IF 3.2 4区化学

Polymer International Pub Date : 2023-09-27 DOI: 10.1002/pi.6573

引用次数: 0

Fine-tuning in-plane interdomain spacing of polystyrene-b-poly(ethene-co-butadiene)-b-polystyrene triblock copolymer adding monodisperse polystyrene 添加单分散PS的SEBS三嵌段共聚物的平面内域间距微调

IF 3.2 4区化学

Polymer International Pub Date : 2023-09-08 DOI: 10.1002/pi.6572

Juliana MP Almeida, Lucas H Staffa, Debora T Balogh, Antonio JF Carvalho

引用次数: 0

Preparation of a water-absorbent mesoporous material and film to simulate the infrared spectrum of plants 模拟植物红外光谱的吸水性介孔材料和膜的制备

IF 3.2 4区化学

Polymer International Pub Date : 2023-09-02 DOI: 10.1002/pi.6571

Siqi Zhang, Jianjun Zhang, Yue Zhang, Sude Ma

{"title":"Preparation of a water-absorbent mesoporous material and film to simulate the infrared spectrum of plants","authors":"Siqi Zhang, Jianjun Zhang, Yue Zhang, Sude Ma","doi":"10.1002/pi.6571","DOIUrl":"10.1002/pi.6571","url":null,"abstract":"Hyperspectral imaging poses great challenges to traditional camouflage materials, primarily because there is a huge difference between the reflectance spectra of camouflage materials and natural plants in the 1400–2000 nm band. The difficulty of simulating the natural plant spectrum lies in reproducing the absorption peak of water by increasing the water content in a camouflage material. Herein, a mesoporous (MS) material is used to simulate the plant spectrum because such material can absorb and retain a large amount of water. MS was prepared via a two-step method using tetraethyl orthosilicate and tetrabutyl titanate. The characteristics of the as-prepared MS were examined via X-ray diffraction, transmission electron microscopy, ultraviolet–visible diffusion reflectance spectroscopy and nitrogen adsorption–desorption isotherms. In addition, a film was prepared using the fully absorbent mesoporous material, and the water content was determined via near-infrared spectroscopy and thermogravimetric analysis. The bonding between the mesoporous material and resin was examined via field emission gun scanning electron microscopy. The mechanical properties of the film were measured by a pendulum hardness tester and a cylindrical bending tester. The results indicate that low-temperature synthesis followed by high-temperature hydrothermal treatment is conducive to expanding the mesopore aperture, reaching a maximum of 23 nm. Moreover, the regular structure of the as-prepared titanium-containing mesoporous material is maintained under high hydrothermal temperature. The mesoporous film exhibits a good water absorption capacity of up to 80% by mass and can effectively simulate the spectrum of plants. The mechanical properties of the film are good, and the hardness of the film is related to the content of mesoporous powder. © 2023 Society of Industrial Chemistry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"73 1","pages":"61-67"},"PeriodicalIF":3.2,"publicationDate":"2023-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46741771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Special issue: visionary polymer research for a better world. The professor R.G. ‘Dick’ Jones commemorative issue 特刊：富有远见的聚合物研究，创造更美好的世界。R.G.‘Dick’Jones教授纪念版

IF 3.2 4区化学

Polymer International Pub Date : 2023-09-01 DOI: 10.1002/pi.6566

Dr Roger C. Hiorns

引用次数: 0

Designing of molecularly imprinted polymer with carboxylic acid functionality for chiral separation of (±)-3,4-methylenedioxymethamphetamine 具有羧酸官能团的分子印迹聚合物设计用于手性分离（±）-3,4-亚甲基二氧基甲基苯丙胺

IF 3.2 4区化学

Polymer International Pub Date : 2023-08-28 DOI: 10.1002/pi.6570

Hussam Y. Alharbi, Majed S. Aljohani, Mohammed Monier

{"title":"Designing of molecularly imprinted polymer with carboxylic acid functionality for chiral separation of (±)-3,4-methylenedioxymethamphetamine","authors":"Hussam Y. Alharbi, Majed S. Aljohani, Mohammed Monier","doi":"10.1002/pi.6570","DOIUrl":"10.1002/pi.6570","url":null,"abstract":"In this work, we discuss the development of a long-lasting enantioselective material for the effective enantio-recognition of S-3,4-methylenedioxymethamphetamine (S-MDMA) and chiral separation of the (±)-MDMA racemate using a crosslinked poly(acrylic acid-4-vinylpyridine) copolymer. The first step was the synthesis and characterization of an acryloyl-S-MDMA amide. After that, the free radical initiator azobisisobutyronitrile was used to copolymerize the synthesized chiral amide with 4-vinylpyridine and divinylbenzene. The incorporated S-MDMA species were extracted from the polymeric particles by heating them with sodium hydroxide, followed by rinsing with hydrochloric acid. This developed the molecularly imprinted S-MDMA particles, which were visualized with a scanning electron microscope and Fourier transform infrared spectroscopy. The selectivity parameters indicated a higher affinity of the fabricated S-MDMA imprinted particles toward S-MDMA, around 10-fold higher than that related to R-MDMA. Results from Langmuir adsorption experiments at pH 6 demonstrated a maximal capacity of 142 mg g−1. In addition, the values of enantiomeric excess were found to be 94.5% and 79.4% for R- and S-MDMA in the loading and eluant solutions, respectively, after optical separation was done using the column technique. © 2023 Society of Industrial Chemistry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"73 1","pages":"50-60"},"PeriodicalIF":3.2,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44801225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dependence of lithium-ion battery separator porous structure and performance on synchronous bidirectional drawing process regulation of β-crystal polypropylene β晶聚丙烯同步双向拉伸工艺规律对锂离子电池隔膜多孔结构和性能的影响

IF 3.2 4区化学

Polymer International Pub Date : 2023-08-25 DOI: 10.1002/pi.6569

Lei Ding, Dandan Li, Sihang Zhang, Fanghui Du, Daoxin Zhang, Feng Yang

{"title":"Dependence of lithium-ion battery separator porous structure and performance on synchronous bidirectional drawing process regulation of β-crystal polypropylene","authors":"Lei Ding, Dandan Li, Sihang Zhang, Fanghui Du, Daoxin Zhang, Feng Yang","doi":"10.1002/pi.6569","DOIUrl":"10.1002/pi.6569","url":null,"abstract":"Uneven separator porous construction inevitably raises lithium-ion migration barriers within the separator and thus limits overall lithium-ion battery (LIB) performance. In this research, serial LIB separators with various porous constructions were prepared precisely by adjusting the synchronous bidirectional drawing temperatures to confirm the bidirectional drawing mode-determined porous constructions and subsequent mechanical properties, thermal stability and electrochemical properties of separators. Crystal structure analyses, porous construction diagnoses, mechanical property characterizations and electrochemical tests reveal the competitive relationship between lamella slip and separation during the synchronous bidirectional drawing process. Lamella slip weakens at lower drawing temperatures, enhancing lamella separation and molecular chain rupture within amorphous regions. Therefore, a separator with broken fibrils presents optimized permeability and smoothed ion migration channels, but inferior mechanical properties and thermal stability. Excessive temperature highlights lamella slip, which damages the pore-forming process, worsens separator permeability and increases ion migration resistance. An appropriate drawing temperature of 100 °C maximally balances lamella slip and separation behaviors, retains intact fibrils and homogenized porous construction, which endows the separator with strengthened mechanical properties, isotropic thermal stability and optimized electrochemical performances. This study provides new insights for synchronous bidirectional drawing in practical separator fabrication and clarifies separator structure-determined LIB performances. © 2023 Society of Industrial Chemistry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"73 1","pages":"38-49"},"PeriodicalIF":3.2,"publicationDate":"2023-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46033569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Special issue: polymer science and engineering of elastomers stretching elastomers to their limits 特刊:弹性体的高分子科学与工程将弹性体拉伸到极限

IF 3.2 4区化学

Polymer International Pub Date : 2023-08-01 DOI: 10.1002/pi.6561

Tim Long

引用次数: 0

Amphiphilic star copolymers composed of curcumin core for bacterial inactivation 姜黄素核两亲性星形共聚物用于细菌灭活

IF 3.2 4区化学

Polymer International Pub Date : 2023-07-25 DOI: 10.1002/pi.6565

Madson RE Santos, Clara LB Fidelis, Flávia S Zandonadi, Fernando C Giacomelli, Maria Isabel Felisberti

{"title":"Amphiphilic star copolymers composed of curcumin core for bacterial inactivation","authors":"Madson RE Santos, Clara LB Fidelis, Flávia S Zandonadi, Fernando C Giacomelli, Maria Isabel Felisberti","doi":"10.1002/pi.6565","DOIUrl":"10.1002/pi.6565","url":null,"abstract":"Polymeric materials with antimicrobial properties hold the potential to be the next generation of therapeutics. This work reports the preparation of amphiphilic and star-like copolymers through arm-first and reversible addition–fragmentation chain transfer polymerization. The copolymers composed of poly(dimethylamine ethyl methacrylate) (PDMAEMA) as the arms and poly(curcumin dimethacrylate) (PCDMA) as the crosslinked core presented a well-controlled amphiphilic structure with low dispersity values (Ð = 1.15). Varying the [CDMA]:[PDMAEMA] molar ratios (4, 6 and 8) led to a significant increase in the molar mass (153, 688 and 1550 kDa), particle size (33, 90 and 105 nm) and the average number of PDMAEMA arms anchored to the curcumin-based core (12, 52 and 125 arms), as determined by dynamic and static light scattering. The antimicrobial activity of cationic PDMAEMA40-co-PCDMAcore was tested against Escherichia coli in the absence of light and under white light to investigate the photodynamic activity of the copolymers. The results demonstrated a concentration dependence but no additional effect under light irradiation. SEM imaging and live/dead assays revealed extensive membrane damage, evidencing a membrane-disruption mechanism. HeLa viability assays demonstrated that at 1 mg mL−1, 80 ± 10% of the cells demonstrated metabolic activity after 24 h. © 2023 Society of Industrial Chemistry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"73 1","pages":"21-29"},"PeriodicalIF":3.2,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48773595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The evaluation of the effect of metal oxide and ferroelectric ceramic additives on the structural and dielectric properties of epoxy matrix 金属氧化物和铁电陶瓷添加剂对环氧树脂基体结构和介电性能影响的评价

IF 3.2 4区化学

Polymer International Pub Date : 2023-07-19 DOI: 10.1002/pi.6564

Nazlıcan Şahin, Yaşar Karabul, Mehmet Kılıç, Zeynep Güven Özdemir, Kadir Esmer

{"title":"The evaluation of the effect of metal oxide and ferroelectric ceramic additives on the structural and dielectric properties of epoxy matrix","authors":"Nazlıcan Şahin, Yaşar Karabul, Mehmet Kılıç, Zeynep Güven Özdemir, Kadir Esmer","doi":"10.1002/pi.6564","DOIUrl":"10.1002/pi.6564","url":null,"abstract":"This study focused on examining and comparing the effects of Bi2O3, WO3, and ferroelectric Bi2WO6 ceramic particles on the frequency-dependent electrical properties of an epoxy matrix, which is known for its good mechanical strength, easy processability, high oxidation resistance, low dielectric loss, and sealing and adhesive properties. The reinforcing particles as well as the composites were examined by Fourier transform infrared analysis, and electrical measurements were carried out at room temperature with an impedance analyzer in the range 20 Hz to 1 MHz. The energy storage performances of the three composite families were compared by limiting the analysis to the real and imaginary components of the complex dielectric constant (ε′ and ε″), the AC conductivity, and the phase angle. When the ε′ and ε″ values of the pure epoxy and the 20% by mass Bi2O3, WO3 and Bi2WO6 doped composites were compared it was observed that WO3 additive causes higher ε′ values than the other additives in the entire frequency region, ignoring the high dielectric loss. However, when ε′ and ε″ were evaluated together, Bi2O3 and Bi2WO6 additives caused lower dielectric loss than WO3 and higher ε′ values than pure epoxy which make these additives more advantageous than WO3 for energy storage applications. In addition to these examinations, frequency-dependent phase angle evaluation has suggested that 30% Bi2O3 and 20% Bi2WO6 additives can be considered promising for energy storage applications in the high-frequency region. © 2023 The Authors. Polymer International published by John Wiley & Sons Ltd on behalf of Society of Industrial Chemistry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"73 1","pages":"9-20"},"PeriodicalIF":3.2,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/pi.6564","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46165577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Use of a Luffa cylindrica/polypyrrole composite for removing dyes from aqueous media 丝瓜/聚吡咯复合材料去除水中染料的研究

IF 3.2 4区化学

Polymer International Pub Date : 2023-07-15 DOI: 10.1002/pi.6563

Maurício F. de Aguiar, Andressa N. R. Leal, Joyce Silva, Gizele G. F. de Andrade, Celso P. de Melo, Kleber G. B. Alves

{"title":"Use of a Luffa cylindrica/polypyrrole composite for removing dyes from aqueous media","authors":"Maurício F. de Aguiar, Andressa N. R. Leal, Joyce Silva, Gizele G. F. de Andrade, Celso P. de Melo, Kleber G. B. Alves","doi":"10.1002/pi.6563","DOIUrl":"10.1002/pi.6563","url":null,"abstract":"We report the preparation of a Luffa cylindrica/polypyrrole (LC/PPy) composite and its use for the removal of tartrazine dye (E102) from aqueous media. By use of Fourier transform infrared (FTIR) and energy-dispersive X-ray (EDX) spectroscopies, X-ray diffraction (XRD) and scanning electron microscopy (SEM), we were able to confirm that the PPy chains thoroughly coat the LC matrix, with the composite presenting both amorphous and crystalline phases such as pristine LC. We examined the effects of varying parameters, such as the times allotted for the polymerization and the dye–adsorbent interaction, the E102 initial concentration and the temperature and pH of the solution, on the removal capacity (qe) of the composite. The largest adsorption rate was exhibited by the composite resulting from a 30 min polymerization. At 298 K, the highest value of qe (374.2 mg g−1) occurred at pH 2.0, after 360 min of interaction. The adsorption process occurs spontaneously and is favored by an increase in temperature, with qe = 672.4 mg g−1 at 313 K. We determined that the composite could be used in at least five consecutive adsorption–desorption cycles without noticeable losses of properties. Preliminary experiments indicate that good results were also obtained for the removal of the dyes Remazol Black B, methylene blue and toluidine blue. Overall, these results suggest that the LC/PPy composite is a promising material for use in protocols of removal of dyes from aqueous media. © 2023 Society of Industrial Chemistry.","PeriodicalId":20404,"journal":{"name":"Polymer International","volume":"72 12","pages":"1112-1121"},"PeriodicalIF":3.2,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44482991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0