中华医学超声杂志

应用化学 ›› 2010, Vol. 27 ›› Issue (03): 290-294.DOI: 10.3724/SP.J.1095.2010.90258

• 研究论文 • 上一篇    下一篇

含氟两亲接枝共聚物的制备及其结晶行为

熊圣东1,王应席1,黄丽君1,张凌飞1,易昌凤1,2,徐祖顺1,2*   

  1. (1.湖北大学材料科学与工程学院 武汉 430062;2.湖北大学功能材料绿色制备与应用教育部重点实验室 武汉 430062)
  • 收稿日期:2009-04-09 修回日期:2009-08-13 出版日期:2010-03-10 发布日期:2010-03-10
  • 通讯作者: 徐祖顺，男，教授，博士生导师; E-mail:zushunxu@hubu.edu.cn; 研究方向：含氟聚合物、乳液聚合、功能高分子、树形聚合物
  • 基金资助:
    “十一五”国家科技支持计划重点项目（2008BAC32B03）

Synthesis of Amphiphilic graft Fluoro-Copolymer and Their Crystallization Behavior

XIONG Sheng-Dong1, WANG Ying-Xi1, HUANG Li-Jun1, ZHANG Ling-Fei1, YI Chang-Feng1,2, XU JZhu-Shun1,2*   

  1. (1.College of Materials Science and Engineering,Hubei University,Wuhan 430062;
    2.Ministry of Education Key Laboratory for the Green Preparation and Application
    of Functional Materials，Hubei University,Wuhan 430062)
  • Received:2009-04-09 Revised:2009-08-13 Published:2010-03-10 Online:2010-03-10

PDF

1280

摘要：

采用大分子单体技术合成了一系列以聚乙二醇为支链、甲基丙烯酸六氟丁酯为主链的含氟两亲接枝共聚物(PHFMA-g-PSPEG)。用1H NMR和凝胶色谱(GPC)对制备的大分子单体和两亲接枝共聚物的结构进行了表征。利用示差扫描量热法(DSC)、X射线衍射(XRD)和偏光显微镜(POM)测试技术对含氟两亲接枝共聚物的结晶行为进行了研究。DSC和XRD结果表明，随着共聚物中含氟链段质量分数的增加，其结晶温度(Tc)和结晶度(Xc)均降低，而结晶熔融温度(Tm)先减小后增加。POM发现，随着共聚物中含氟链段质量分数的增加，其结晶速度减慢，共聚物形成清晰球晶的能力减弱，当共聚物中含氟链段质量分数为57％时，含氟两亲接枝共聚物已不能形成清晰的球晶。

关键词: 含氟聚合物, 聚乙二醇, 两亲接枝共聚物, 结晶

Abstract:

A series of amphiphilic graft copolymers P(SPEG)-g-P(HFMA) comprising poly(hexafluorobutyl methacrylate)(PHFMA) backbones and poly(ethylene glycol) (PEG) side chains were synthesized via a macromonomer method. The resultant macromonomer and amphiphilic graft copolymer were characterized by 1H NMR and GPC spectroscopy. The crystallization of P(SPEG)-g-P(HFMA) was studied by differential scanning calorimeter(DSC), X-ray diffraction(XRD) and polarized optical microscope(POM). DSC and XRD measurements indicated that the crystallizing temperature(Tc) and degree of crystallinity(Xc) of the copolymer decreased with the increase of HFMA content in the graft copolymer. The melting temperature (Tm) of the amphiphilic graft copolymer first decreased appropriate and then increased with the increase of HFMA content in the graft copolymer. POM micrographs showed that the crystal rate of the graft copolymer decreased and the PEG phase has a decreasing propensity for spherical crystallization and less clear spherical structures as the HFMA content in the graft copolymer increases. When the HFMA content in the graft copolymer was 57%, no clear crystalline was found.

Key words: fluoropolymers, poly(ethylene glycol) (PEG), amphiphilic graft copolymer, crystallization

中图分类号: 

网站版权 © 应用化学     本网站备案：吉ICP备12000082号