Reactive extrusion of polyolefin ternary blends
Reactive extrusion of polyolefin ternary blends
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DOI：
10.1002/(sici)1097-4628(19960620)60:12
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发表时间：
1996-06
影响因子：
3
通讯作者：
B. Kim;C. Choi
中科院分区：
文献类型：
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作者：
B. Kim;C. Choi
采用同向双螺杆挤出机对聚丙烯（PP）/三元乙丙橡胶（EPDM）/高密度聚乙烯（PE）（80/10/10）共混物进行了反应挤出。过氧化物和活性助剂的浓度和挤出机转速的影响进行了研究，在流变学，形态学，热，和机械性能的共混物。与未处理的共混物相比，经过氧化物处理的共混物的熔体粘度根据活性助剂的量而增加或降低。形态学上，界面模糊，只有过氧化物处理，并获得显着的域减少时，过氧化物和助剂一起使用。PP的Tm（结晶熔融温度）和Tg（玻璃化转变温度）在共混物中均有所提高，而PE的Tm和Tg略有降低。
Reactive extrusion of polypropylene (PP)/ethylene-propylene-diene terpolymer (EPDM)/high-density polyethylene (PE) (80/10/10 by weight) blends were carried out using a corotating twin-screw extruder. The effects of peroxide and coagent concentrations and extruder rpm were studied in terms of rheological, morphological, thermal, and mechanical properties of the blends. Melt viscosity of the peroxide-treated blend increased and decreased over the untreated one depending on the amount of a coagent. Morphologically, interfaces blur with only a peroxide treatment, and significant domain reduction was obtained when peroxide and a coagent were used together. Both T m (crystalline melting temperature) and T g (glass transition temperature) of PP increased in the blend, whereas those of PE slightly decreased.