Effect of Initial Polymer Concentration on the Crystallization of Poly (Vinylidene Fluoride)/Poly (Methyl Methacrylate) Blend from Solution Casting

IF 1.4 4区工程技术 Q4 POLYMER SCIENCE Journal of Macromolecular Science Part B-Physics Pub Date : 2007-12-01 DOI:10.1080/00222340701746127

Wenzhong Ma, Jun Zhang, Xiao-lin Wang

{"title":"Effect of Initial Polymer Concentration on the Crystallization of Poly (Vinylidene Fluoride)/Poly (Methyl Methacrylate) Blend from Solution Casting","authors":"Wenzhong Ma, Jun Zhang, Xiao-lin Wang","doi":"10.1080/00222340701746127","DOIUrl":null,"url":null,"abstract":"The effect of initial polymer concentration on the crystallization of a poly (vinylidene fluoride) (PVDF)/poly (methyl methacrylate) (PMMA) blend (mass ratio=70/30) prepared by solution casting was investigated. Confirming by Fourier transform infrared spectroscopy (FT‐IR), differential scanning calorimetry (DSC) and wide angle X‐ray scattering (WAXD), exclusively β phase was observed in the films regardless of initial polymer concentration. Surface film morphologies examined by scanning electron microscopy (SEM) were found to be strongly dependent on the concentration. An increase of concentration resulted in a decrease of the spherulite size and a uniform distribution of PVDF spherulites owing to the fast formation of nuclei at high concentration. Correspondingly, the lateral crystal size and crystallinity of PVDF obtained from high concentration c (>10 wt.%) was less than those generated from low concentration (5–10 wt.%). This was mainly due to the reduced growth of PVDF crystals, which was caused by the increased solution viscosity and entanglement of the polymer chains with increase of concentration.","PeriodicalId":54787,"journal":{"name":"Journal of Macromolecular Science Part B-Physics","volume":"17 1","pages":"139 - 149"},"PeriodicalIF":1.4000,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"28","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Macromolecular Science Part B-Physics","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1080/00222340701746127","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}

引用次数: 28

Abstract

The effect of initial polymer concentration on the crystallization of a poly (vinylidene fluoride) (PVDF)/poly (methyl methacrylate) (PMMA) blend (mass ratio=70/30) prepared by solution casting was investigated. Confirming by Fourier transform infrared spectroscopy (FT‐IR), differential scanning calorimetry (DSC) and wide angle X‐ray scattering (WAXD), exclusively β phase was observed in the films regardless of initial polymer concentration. Surface film morphologies examined by scanning electron microscopy (SEM) were found to be strongly dependent on the concentration. An increase of concentration resulted in a decrease of the spherulite size and a uniform distribution of PVDF spherulites owing to the fast formation of nuclei at high concentration. Correspondingly, the lateral crystal size and crystallinity of PVDF obtained from high concentration c (>10 wt.%) was less than those generated from low concentration (5–10 wt.%). This was mainly due to the reduced growth of PVDF crystals, which was caused by the increased solution viscosity and entanglement of the polymer chains with increase of concentration.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

聚合物初始浓度对聚偏氟乙烯/聚甲基丙烯酸甲酯共混结晶的影响

研究了聚合物初始浓度对溶液铸造法制备聚偏氟乙烯(PVDF)/聚甲基丙烯酸甲酯(PMMA)共混物(质量比为70/30)结晶的影响。傅里叶变换红外光谱(FT - IR)、差示扫描量热法(DSC)和广角X射线散射(WAXD)证实，无论初始聚合物浓度如何，膜中都只观察到β相。通过扫描电子显微镜(SEM)检查的表面膜形态发现强烈依赖于浓度。浓度增加导致球晶尺寸减小，PVDF球晶分布均匀，因为在高浓度下球晶核形成快。相应的，高浓度c (>10 wt.%)得到的PVDF横向晶粒尺寸和结晶度小于低浓度c (5 ~ 10 wt.%)得到的PVDF。这主要是由于PVDF晶体的生长减少，这是由于溶液粘度增加，聚合物链的缠结随着浓度的增加而增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Journal of Macromolecular Science Part B-Physics 工程技术-高分子科学

CiteScore

2.50

自引率

21.40%

发文量

审稿时长

2.3 months

期刊介绍： Devoted to the publication of significant fundamental contributions to the physics of macromolecular solids and liquids, both synthetic and natural, this international journal publishes original research in all of the areas generally included in both polymer solid state and liquid physics. This authoritative journal contains papers reporting research in transition mechanisms and structure-property relationships, the physics of polymer solutions and melts, of glassy and rubbery amorphous solids, and the physics of individual polymer molecules.