The effect of transreactions on phase behavior in poly(ethylene 2,6‐naphthalate) and poly(ethylene isophthalate) blends
The effect of transreactions on phase behavior in poly(ethylene 2,6‐naphthalate) and poly(ethylene isophthalate) blends
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DOI：
10.1002/(sici)1097-4628(19990906)73:10
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发表时间：
1999-09
影响因子：
3
通讯作者：
Y. Chang;J. Youk;W. Jo;Sang Cheol Lee
中科院分区：
文献类型：
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作者：
Y. Chang;J. Youk;W. Jo;Sang Cheol Lee
用差示扫描量热法研究了反应对聚2，6-萘二甲酸乙二酯和间苯二甲酸乙二酯共混物相行为的影响。核磁共振氢谱证实了两种聚合物之间的反式反应。在交叉反应的开始阶段，共混样品显示了两个玻璃化转变。然而，在发生一定程度的交叉反应后(即，当随机度为>；0.4时)，观察到单一的玻璃化转变。随着反应的进行，富含2，6-萘二甲酸乙二酯和富间苯二甲酸乙二酯之间的组成差异减小。此外，随着反应时间的延长，界面分数增加，各相的质量分数减小。
The effect of transreactions on the phase behavior in poly(ethylene 2,6-naphthalate) and poly(ethylene isophthalate) blends was investigated by using differential scanning calorimetry. The transreactions between two polymers were confirmed by 1 H nuclear magnetic resonance. At the beginning step of transreactions, the blend samples show two glass transitions. However, after transreactions occur to some extent (i.e., when the degree of randomness is >0.4), a single glass transition is observed. As the transreactions proceed, the composition difference between ethylene 2,6-naphthalate-rich and ethylene isophthalate-rich phases lessens. Additionally, the weight fraction of each phase decreases because of the increment of interfacial fraction with the lapse of reaction time.