Melting behaviour of poly(butylene succinate) in miscible blends with poly(ethylene oxide)
Melting behaviour of poly(butylene succinate) in miscible blends with poly(ethylene oxide)
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DOI：
10.1016/s0032-3861(03)00216-7
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发表时间：
2003-05
期刊：
影响因子：
4.6
通讯作者：
Zhaobin Qiu;T. Ikehara;T. Nishi
中科院分区：
文献类型：
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作者：
Zhaobin Qiu;T. Ikehara;T. Nishi
聚丁二酸丁二醇酯（PBSU）在与聚环氧乙烷（PEO）的混溶共混物中的熔融行为是我们课题组新发现的两种结晶聚合物的聚合物共混物，已通过常规差示扫描量热法（DSC）进行了研究。研究发现，在一定的结晶条件下，PBSU从熔体等温结晶后表现出双熔融行为，这可以用熔融、再结晶和重熔模型来解释。共混物组成、结晶温度和扫描速率对 PBSU 熔化行为的影响已得到广泛研究。随着PEO组成、结晶温度和扫描速率的任意增加，PBSU的重结晶受到抑制。此外，本工作还采用调温差示扫描量热法（TMDSC）研究PBSU/PEO共混物中PBSU的熔融行为，因为它具有将放热（包括结晶和重结晶）与可逆熔融（包括DSC扫描之前原始存在的晶体的熔融和DSC扫描期间通过重结晶形成的晶体的熔融）分离的优势。 TMDSC 实验提供了这种熔化、重结晶和重熔化模型的直接证据，以解释 PBSU/PEO 共混物中 PBSU 的多重熔化行为。
The melting behavior of poly(butylene succinate) (PBSU) in miscible blends with poly(ethylene oxide) (PEO), which is a newly found polymer blends of two crystalline polymers by our group, has been investigated by conventional differential scanning calorimetry (DSC). It was found that PBSU showed double melting behavior after isothermal crystallization from the melt under certain crystallization conditions, which was explained by the model of melting, recrystallization and remelting. The influence of the blend composition, crystallization temperature and scanning rate on the melting behavior of PBSU has been studied extensively. With increasing any of the PEO composition, crystallization temperature and scanning rate, the recrystallization of PBSU was inhibited. Furthermore, temperature modulated differential scanning calorimetry (TMDSC) was also employed in this work to investigate the melting behavior of PBSU in PBSU/PEO blends due to its advantage in the separation of exotherms (including crystallization and recrystallization) from reversible meltings (including the melting of the crystals originally existed prior to the DSC scan and the melting of the crystals formed through the recrystallization during the DSC scan). The TMDSC experiments gave a direct evidence of this melting, recrystallization and remelting model to explain the multiple melting behavior of PBSU in PBSU/PEO blends.