Rheological and mechanical properties in polyethylene blends
Rheological and mechanical properties in polyethylene blends
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DOI：
10.1002/pen.10366
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发表时间：
1998-12-01
影响因子：
3.2
通讯作者：
Choe, SJ
中科院分区：
文献类型：
--
作者：
Cho, KC;Lee, BH;Choe, SJ
研究了线性低密度聚乙烯（LLDPE）/低密度聚乙烯（LDPE）、线性低密度聚乙烯（LLDPE）/高密度聚乙烯（HDPE）和HDPE/LDPE共混体系的熔体流变性能和力学性能。所有三种共混物在熔体中是可混溶的，但是LLDPE/LDPE和HDPE/LDPE共混物表现出两个结晶和熔融温度，表明这些共混物在从熔体冷却时相分离。共混物的熔体强度随着所使用的LDPE的分子量的增加而增加。LLDPE/LDPE共混物的力学性能高于简单混料规则的预测值，而LLDPE/HDPE共混物的力学性能符合混料规则，而HDPE/LDPE的力学性能低于混料规则的预测值。
Melt rheology and mechanical properties in linear low density polyethylene (LLDPE)/low density polyethylene (LDPE), LLDPE/high density polyethylene (HDPE), and HDPE/LDPE blends were investigated. All three blends were miscible in the melt, but the LLDPE/LDPE and HDPE/LDPE blends exhibited two crystallization and melting temperatures, indicating that those blends phase separated upon cooling from the melt. The melt strength of the blends increased with increasing molecular weight of the LDPE that was used. The mechanical properties of the LLDPE/LDPE blend were higher than calculated from a simple rule of mixtures, while those of the LLDPE/HDPE blend conformed to the rule of mixtures, but the properties of HDPE/LDPE were less than the rule of mixtures prediction.