Miscibility and Crystallization Behavior of Novel Branched Poly(ethylene succinate)/Poly(vinyl phenol) Blends
Miscibility and Crystallization Behavior of Novel Branched Poly(ethylene succinate)/Poly(vinyl phenol) Blends
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DOI：
10.1007/s10118-019-2269-1
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发表时间：
2019-05
影响因子：
4.3
通讯作者：
Kang-jing Zhang;Zhaobin Qiu
中科院分区：
文献类型：
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作者：
Kang-jing Zhang;Zhaobin Qiu
采用溶液法和流延法制备了新型支化聚丁二酸乙二酯（b-PES）/聚乙烯基苯酚（PVPh）共混物。研究了b-PES/PVPh共混体系的相容性、熔融行为、球晶形态、球晶生长和晶体结构。PVPh与b-PES在整个组合物上是可混溶的，如由单一组合物依赖的玻璃化转变温度所证明的。纯b-PES和b-PES/PVPh 85/15共混物在等温熔融结晶后均出现了双熔融行为，这可能是由熔融-再结晶-再熔融机制解释的。此外，还发现85/15共混物的平衡熔点降低，再次证实了两种组分之间的相容性。PVPh的加入降低了共混物中b-PES球晶的成核密度和晶体生长速率。共混前后b-PES的晶体结构基本不变，但结晶度略有下降。
The blends of novel branched poly(ethylene succinate) (b-PES) and poly(vinyl phenol) (PVPh) were preparedviaa solution and casting method. The miscibility, melting behavior, spherulitic morphology and growth, and crystal structure of b-PES/PVPh blends were investigated in detail. PVPh was miscible with b-PES over the whole compositions as evidenced by the single composition dependent glass transition temperature. Double melting behavior occurred in neat b-PES and b-PES/PVPh 85/15 blend after isothermal melt crystallization, which may be explained by the melting, recrystallization, and remelting mechanism. In addition, the depression of equilibrium melting point of an 85/15 blend was also found, confirming again the miscibility between the two components. The addition of PVPh caused the decrease of nucleation density and crystal growth rates of b-PES spherulites in the blend. The crystal structure of b-PES was unchanged before and after blending; moreover, the crystallinity of b-PES decreased slightly in the blend.