聚乙二醇／聚乙烯醇共混物的相变特性与结晶  

Study on phase change behavior and crystallization of polyethylene glycol （PEG）/poly（vinyl alcohol） （PVA） blends

作　　者：张梅[1,2] 李全明[1] 栾加双[1] 靳玉伟[1,2] 马荣堂[2] 

机构地区：[1]吉林大学军需科技学院,吉林长春130062 [2]吉林大学麦克德尔米德实验室,吉林长春130062

出　　处：《功能材料》2007年第A04期1692-1694,共3页Journal of Functional Materials

基　　金：基金项目：吉林大学博士基金资助项目（430505010281）

摘　　要：通过溶液共混法制备了系列PEG4000／PVA共混物，并采用DSC、WAXD、FT-IR等手段对共混体系的相变特性及结晶进行了探讨。结果表明：共混体系具有可逆的固-固相转变特性。共混物的熔点（Tm）基本保持不变，而结晶峰值温度（Tc）与PEG／PVA质量百分含量有关。其相变焓是随着PEG含量的增加而逐渐增加。聚乙烯醇的存在对共混体系中PEG的结晶和熔融过程均有所影响，但共混体系与纯PEG4000具有相同的衍射线、衍射角和面间距，且并未发现新的衍射峰出现。共混体系中x射线衍射峰的半峰宽度大于纯PEG的半峰宽度，说明共混过程使PEG结晶粒子变小。New serials of PEG/PVA solvent blend copolymers were prepared. The phase change behavior and crystallization were analyzed by DSC, WAXD and FT-IR. The result indicated that these transitions are all reversible, Tc of these blends are related to the weight percentage of PEG/PVA, at the same time, the enthalpy will grow along with the gradually increase in weight percentage of PEG. Their melting and crystalline procedures were affected due to the addition of PVA. The half peak width of PEG4000 was lower than blends, and half peak width were highest when the blend orooortions of PEG/PVA would near to 50/50.

关 键 词：聚乙二醇 聚乙烯醇 固-固相变 共混 结晶 

分 类 号：O631[理学—高分子化学]