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Exploring heat induced shape memory behaviour of alpha olefinic blends having dual network structure

机译：探索具有双网状结构的α烯烃共混物的热诱导形状记忆行为

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摘要

Temperature dependent shape memory polymer blends of alpha olefins (EOC 8440:EOC 8200) at a fixed blend ratio (50:50) have been developed. Alpha olefins with dual architecture get crosslinked to a different extent upon exposure of electron beam (EB) irradiation. The extent of crosslinking in EOC 8200 copolymer was much more than the EOC 8440 copolymer. In case of EOC 8440 copolymer, tendency of the breakage of the crystalline region is higher than the EOC 8200 copolymer and this is supported by the differential scanning calorimetry (DSC) study. Following the DSC melting endotherm, shape memory study was carried out at 70 degrees C, which shows that the shape fixity value is reduced and shape recovery value is improved with the application of the increasing radiation dose. Improvement of creep behaviour indicates higher creep recovery of the radiation crosslinked blends which also supports the superior shape memory behaviour of the crosslinked blends.
机译：已经开发出以固定的混合比（50:50）的α-烯烃随温度变化的形状记忆聚合物共混物（EOC 8440：EOC 8200）。具有双重结构的α-烯烃在暴露于电子束（EB）辐射下以不同程度交联。 EOC 8200共聚物中的交联程度远远大于EOC 8440共聚物。在EOC 8440共聚物的情况下，结晶区断裂的趋势高于EOC 8200共聚物，这通过差示扫描量热法（DSC）研究得到支持。在DSC熔化吸热之后，在70摄氏度下进行了形状记忆研究，结果表明，随着辐射剂量的增加，形状固定值降低，形状恢复值提高。蠕变行为的改善表明辐射交联共混物的蠕变回复率更高，这也支持了交联共混物的优异形状记忆行为。

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