含氟两亲接枝共聚物的制备及其结晶行为  

Synthesis of Amphiphilic Graft Fluoro-Copolymers and Their Crystallization Behaviors

作　　者：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] 

机构地区：[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

出　　处：《应用化学》2010年第3期290-294,共5页Chinese Journal of Applied Chemistry

基　　金："十一五"国家科技支持计划重点项目(2008BAC32B03)

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1HNMR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。A series of amphiphilic graft copolymers P（SPEG） -g-P（HFMA） comprising poly （ hexafluorobutyl methacrylate） （PHFMA） backbones and poly （ethylene glycol） （PEG） side chains was synthesized v/a a macromonomer method. The resultant macromonomer and amphiphilic graft copolymers were characterized by 1H NMR and GPC spectroscopy. The crystallization of P （SPEG）-g-P （HFMA） was studied by differential scanning calorimetry （ DSC ）, X-ray diffraction （ XRD ） and polarized optical microscopy （ POM ）. DSC and XRD measurements indicated that the crystallizing temperature （ Te ） and crystallinity （ Xc ） of the copolymer all decreased with the increase of HFMA content,in the graft copolymer. The melting temperature （ Tm ） of the amphiphilic graft copolymer first decreased appropriately 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 had a decreasing tendency for spherical crystallization and less clear spherical structure as the HFMA content in the graft copolymer increased. When the HFMA content in the graft copolymer was 57%, no clear crystalline was found.

关 键 词：含氟聚合物 聚乙二醇 两亲接枝共聚物 结晶 

分 类 号：O631.1[理学—高分子化学]