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很多高抗冲聚苯乙烯(HIPS)是属于聚苯乙烯和聚丁二烯的二相共混体系,其中聚苯乙烯是连续的塑料相,聚丁二烯是分散的橡胶相。高抗冲聚苯乙烯的抗冲强度与聚丁二烯的组成和浓度、粒子大小、形态和含量、交联程度等有关,也跟聚苯乙烯的状态、分子量和分子量分布等有关。这些因素可能是互相有关联的,因此要找出冲击性能和结构因素之间的关系,只能在变动一种因素,固定其他因素的条件下进行研究。本文利用改进的自由振动仪,首先测试了三种不同来源的高抗冲聚苯乙烯的动态切变模量和力学阻尼,以了解各种HIPS的组成对力学性能的影响;然后着重测试了几类不同聚顺丁二烯(顺丁胶)含量的高抗冲聚苯乙烯的低温阻尼峰,从而研究不同制备方法的橡胶相含量对力学阻尼和抗冲性能之间的关系。
Many high impact polystyrenes (HIPS) are two phase blends of polystyrene and polybutadiene, with polystyrene being the continuous plastic phase and polybutadiene being the dispersed rubber phase. The impact strength of high-impact polystyrene is related to the composition and concentration of polybutadiene, particle size, morphology and content, degree of crosslinking and the like, as well as the polystyrene state, molecular weight and molecular weight distribution. These factors may be related to each other, so to find the relationship between the impact of performance and structural factors, only one factor changes, fixed other factors under the conditions of research. In this paper, using an improved free vibration tester, the dynamic shear modulus and mechanical damping of high impact polystyrene from three different sources were first tested to understand the effect of the composition of various HIPS on the mechanical properties. Then, Type polybutadiene (butadiene rubber) content of high-impact polystyrene low-temperature damping peak to study the different preparation methods of the rubber phase content of the relationship between the mechanical damping and impact resistance properties.