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LLDPE/LDPE Blends.I.Rheological,Thermal,and Mechanical Properties

机译:LLDPE / LDPE共混物。流变,热学和机械性能

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Structure and mechanical properties were studied for binary blends of a linear low density polyethylene (LLDPE) (ethylene-1-hexene copolymer;density = 900 kg m~(-3)) with narrow whort chain branching distribution and a low density polyethylene (LDPE) which is characterized by the long chain branches.It was found by the rheological measurements that the LLDPE and the LDPE are miscible in the molten state.The steady-state rheological proerties of the blends can be predicted using oscillatory shear moduli.Furthermore,the crystallization temperature of LDPE is higher than that of the LLDPE and is found to act as a nucleating agent for the crystallization of the LLDPE.Consequently,the melting temperature,degree of crystallinity,and hardness of the blend increase rapidly with increases in the LDPE content in the blend,even though the amount of the LDPE in the blend is small.
机译:研究了线性低密度聚乙烯(LLDPE)(乙烯-1-己烯共聚物;密度= 900 kg m〜(-3)),麦芽链支化分布窄和低密度聚乙烯(LDPE)的二元共混物的结构和力学性能。通过流变学测量发现,LLDPE和LDPE在熔融状态下是可混溶的。可以使用振荡剪切模量预测混合物的稳态流变性能​​。 LDPE的结晶温度高于LLDPE的结晶温度,并且被发现是LLDPE结晶的成核剂。因此,随着LDPE含量的增加,共混物的熔融温度,结晶度和硬度迅速增加。即使共混物中的LDPE含量很小,在共混物中也是如此。

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