Alternating block copolymers based on polyamide‐12 and polycaprolactone
Alternating block copolymers based on polyamide‐12 and polycaprolactone
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基于聚酰胺-12和聚己内酯的交替嵌段共聚物
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
F. Böhme
中科院分区：
文献类型：
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作者：
A. Gube;L. Jakisch;L. Häussler;K. Schneider;B. Voit;F. Böhme
采用选择性反应偶联剂将端羟基聚己内酯和端氨基聚酰胺-12依次转化，制备了一系列聚酯/聚酰胺交替嵌段共聚物。采用差示扫描量热法和动态力学分析研究了嵌段共聚物的热性能。通过拉伸和冲击试验确定了机械性能。所有聚合物都是相分离的，其中聚酰胺相在所有组合物中都是半结晶的。只有当嵌段长度大于2000 g mol−1时，才观察到聚己内酯相的明显结晶。力学测试表明，聚合物的行为方式类似于热塑性弹性体。特别是，含有高含量聚己内酯的样品表现出高应变和良好的冲击性能。版权所有©2011化工学会
A series of alternating polyester/polyamide block copolymers were prepared by sequential conversion of hydroxy-terminated polycaprolactone and amino-terminated polyamide-12 with a selectively reacting coupling agent. The thermal properties of the block copolymers were investigated using differential scanning calorimetry and dynamic mechanical analysis. Mechanical properties were determined using tensile and impact tests. All polymers were phase-separated, where the polyamide phase was semicrystalline in all compositions. Distinct crystallization of the polycaprolactone phase was observed only when the block length was greater than 2000 g mol−1. Mechanical testing showed that the polymers behave in a manner similar to that of thermoplastic elastomers. In particular, samples with a high content of polycaprolactone showed high strain and good impact behaviour. Copyright © 2011 Society of Chemical Industry