Comparative studies on miscibility and phase behavior of linear and star poly(2‐methyl‐2‐oxazoline) blends with poly(vinylidene fluoride)
Comparative studies on miscibility and phase behavior of linear and star poly(2‐methyl‐2‐oxazoline) blends with poly(vinylidene fluoride)
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DOI：
10.1002/polb.20748
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发表时间：
2006-03
期刊：
影响因子：
--
通讯作者：
Jiazhong Shen;Sixun Zheng
中科院分区：
文献类型：
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作者：
Jiazhong Shen;Sixun Zheng
对线型和星形聚2-甲基-2-恶唑啉与聚偏氟乙烯（PVDF）共混物的相容性和相行为进行了比较研究。在对甲苯磺酸甲酯（MeOTs）存在下，通过2-甲基-2-恶唑啉的开环聚合，合成了线型聚2-甲基-2-恶唑啉;以八（3-碘丙基）笼型低聚倍半硅氧烷[（IC 3 H6）8 Si 8 O 12，OipPOSS]为八官能度引发剂，合成了星形聚2-甲基-2-恶唑啉。用傅里叶变换红外光谱和核磁共振谱对不同拓扑结构的聚合物进行了表征。结果表明，星型聚（2-甲基-2-恶唑啉）与聚偏氟乙烯（PVDF）具有良好的相容性，表现为单一的玻璃化转变温度行为和平衡熔点下降。然而，线性聚（2-甲基-2-恶唑啉）与PVDF的共混物是相分离的。PMOx大分子的拓扑结构对溶解性的影响是导致溶解性差异的主要原因。
The comparative studies on the miscibility and phase behavior between the blends of linear and star-shaped poly(2-methyl-2-oxazoline) with poly(vinylidene fluoride) (PVDF) were carried out in this work. The linear poly(2-methyl-2-oxazoline) was synthesized by the ring opening polymerization of 2-methyl-2-oxazoline in the presence of methyl p-toluenesulfonate (MeOTs) whereas the star-shaped poly(2-methyl-2-oxazoline) was synthesized with octa(3-iodopropyl) polyhedral oligomeric silsesquioxane [(IC 3 H 6 ) 8 Si 8 O 12 , OipPOSS] as an octafunctional initiator. The polymers with different topological structures were characterized by means of Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. It is found that the star-shaped poly(2-methyl-2-oxazoline) was miscible with poly(vinylidene fluoride) (PVDF), which was evidenced by single glass-transition temperature behavior and the equilibrium melting-point depression. Nonetheless, the blends of linear poly(2-methyl-2-oxazoline) with PVDF were phase-separated. The difference in miscibility was ascribed to the topological effect of PMOx macromolecules on the miscibility.