Dynamic mechanical properties, structure, and composition of impact polystyrene
Dynamic mechanical properties, structure, and composition of impact polystyrene
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抗冲聚苯乙烯的动态机械性能、结构和组成
DOI：
10.1002/app.1970.070140712
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发表时间：
1970
期刊：
影响因子：
--
通讯作者：
G. Cigna
中科院分区：
文献类型：
--
作者：
G. Cigna
研究了两个系列的冲击聚苯乙烯；它们是在已知的两种不同的聚丁二烯水平上通过接枝和机械混合得到的。通过光学显微镜和理化分离对其双相结构进行了表征。考察了分散相和连续相的形态和含量、分散相的组成、连续相的分子量等因素。测量了弹性剪切模量和力学阻尼。研究发现，这两种材料的弹性剪切模量并不像文献中经常提出的那样取决于聚丁二烯的总含量，而是取决于橡胶分散相的含量。尽管该相的聚丁二烯浓度在机械混合物的100%和其中一种接枝聚合物的34%之间变化，但并不影响上述相关性。分散相的粒径和连续相的分子量对其影响很小或没有影响。所发现的相关性与由球体或粒子在矩阵中的分散组成的模型的模量理论一致，如Kerner，13 Hashin,14,15和mackenzie的理论
Two series of impact polystyrene were studied; they had been obtained by grafting and by mechanical mixing, at two different known polybutadiene levels. Their biphasic structure had been characterized by optical microscopy and physicochemical separation. The following factors were investigated: morphology and content of the dispersed phase and continuous phase, composition of the dispersed phase, and molecular weight of the continuous phase. The elastic shear modulus and mechanical damping were measured. It was found that the elastic shear modulus of the two series of materials does not depend on the total polybutadiene content, as is often suggested in the literature, but on the rubbery dispersed phase content. The polybutadiene concentration of this phase, although varying between 100% for the mechanical mixes and 34% for one of the grafted polymers, does not influence the mentioned correlation. The particle size of the dispersed phase and the molecular weight the continuous phase have very little or no influence. The found correlation agrees with the theories for the moduli of models consisting of dispersions of spheres or particles in a matrix, like those of Kerner,13 Hashin,14,15 and Mackenzie.18