Phase behavior and mechanical properties of heterophasic polypropylene-ethylene/propylene copolymers systems
Phase behavior and mechanical properties of heterophasic polypropylene-ethylene/propylene copolymers systems
复制标题
异相聚丙烯-乙烯/丙烯共聚物体系的相行为和机械性能
DOI：
10.14314/polimery.2005.279
复制
发表时间：
2005
期刊：
影响因子：
1.6
通讯作者：
G. Lohse
中科院分区：
文献类型：
--
作者：
H. Radusch;P. Doshev;G. Lohse
在下面的研究中，相之间的相互作用，形态发展和所得到的多相聚丙烯-乙烯/丙烯共聚物（PP/EP）系统的机械性能进行了研究，EP组合物和基质和分散相分子量。结果表明，形成基体和分散相的组分之间的相容性，以及分散域的尺寸主要由EP中的乙烯含量控制。发现乙烯/丙烯共聚物中乙烯含量的降低产生分散粒度的强烈细化，并相应地降低材料的脆韧转变温度（T B D T），如通过常规冲击测试所定义的。然而，一般的断裂能水平被发现是由共混物组分的分子量。EP和PP的分子量的增加对所研究的共混物的韧性表现出有益的影响。
In the following study the interactions between the phases, the morphology development and the resulting mechanical performance of the heterophasic polypropylene-ethylene/propylene copolymers (PP/EP) systems were investigated with respect to EP composition and matrix and dispersed phase molecular weights. It was shown that the compatibility between the components forming the matrix and the dispersed phase, as well as the dimensions of the dispersed domains were primarily controlled by ethylene content in EP. The decrease of ethylene content in ethylene/propylene copolymer was found to produce a strong refinement of the dispersed particle size and accordingly a reduction of the brittle to ductile transition temperature (T B D T ) of the materials, as defined by conventional impact testing. However, the general fracture energy level was found to be governed by the molecular weights of the blend components. Increasing molecular weight of EP as well as of PP showed a beneficial effect on the toughness of the investigated blends.