一种新型EPDM改性聚苯乙烯高抗冲材料的制备

Preparation of a New EPDM Modified High Impact Polystyrene Material

以聚苯乙烯(PS)为基体材料,以三元乙丙橡胶(EPDM)为增韧剂,以轻质CaCO3为填充剂,对PS材料进行增韧改性;探讨了EPDM含量、轻质CaCO3含量对改性PS塑料性能的综合影响。实验结果表明:当EPDM与PS的质量比为4∶6,并添加20%的轻质CaCO3时,改性PS塑料的拉伸强度达18.1 MPa (>17.0 MPa),抗冲击强度达187.2 J/m (>92.0 J/m),熔融指数达2.6 g/10min (>2.5 g/10min),满足推荐性国家标准GB/T 37198-2018的要求,且均大于当前市面几种常见牌号HIPS性能的最低值。所制得的改性PS材料可作为HIPS的替代产品,完全适用于塑料饰品的加工和生产。

This experiment uses polystyrene(PS) as a matrix material, EPDM as a toughening agent,and light CaCO3 as a filler to toughen and modify PS materials;and EPDM is discussed The comprehensive influence of the content and light CaCO3 content on the properties of modified PS plastics. Experimental results show that when the ratio of EPDM to PS is 4: 6 and 40% light CaCO3 is added, the tensile strength of the modified PS plastic reaches 18.1 MPa( >17.0 MPa) and the impact strength reaches187.2 J/m(>92.0 J/m), the melting index reaches 2.6 g/10 min(>2.5 g/10 min), It meets the requirements of the recommended national standard GB/T 37198-2018, and both are greater than the lowest value of the performance of several common brands of HIPS currently on the market. Therefore, the modified PS material prepared by this process can be used as a substitute for HIPS, which is completely suitable for the processing and production of plastic jewelry.