PP/ABS相容性及其碳酸钙高填充材料力学性能研究

Study on the Compatibility of PP/ABS and the Mechanical Properties of its High Cotent of CaCO3 Filled Composites

    摘要
  • 摘要: 将乙烯-醋酸乙烯共聚物（EVA）、苯乙烯-丁二烯-苯乙烯（SBS）、聚丙烯接枝马来酸酐（PP-g-MAH）三种不同种类的相容剂分别加入PP/ABS（70/30）中，通过同向双螺杆挤出机熔融共混制得PP/ABS共混物和高含量活性碳酸钙（CaCO3）填充PP/ABS复合材料。利用熔体流动速率仪、电子万能试验机、记忆式冲击试验机研究了相容剂类型和含量对PP/ABS共混物及其CaCO3填充复合材料力学性能和加工流动性的影响。结果表明，PP-g-MAH对PP/ABS共混物具有较好的增容效果.当PP-g-MAH含量为30phr时，可以使PP/ABS/CaCO3的拉伸强度提高42%，弯曲强度提高37.5%。由于相容剂PP-g-MAH的增韧作用，当CaCO3用量为60%时，PP/ABS/CaCO3 复合材料仍然具有较好的力学强度和加工流动性。

     

    Abstract: PP/ABS blends and their composites filled by active micro-sized calcium carbonate (CaCO3) were prepared by a co-rotating twin-screw extruder using EVA (ethylene-vinyl acetate copolymer), SBS (styrene-butadiene-styrene) and PP-g-MAH (maleic anhydride grafted polypropylene) as compatibilizers. The effect of kinds and contents of compatibilizers on mechanical properties and processing fluidity were measured by melt flow rate instrument, electron universal testing machine and impact testing machine. The results showed that PP-g-MAH exhibited the best compatibilization on the PP/ABS blends. At the content of PP-g-MAH of 30 phr, the tensile and flexural strength of PP/ABS/CaCO3 composites increased by 42% and 37.5%, respectively. As the PP-g-MAH was used as compatibilizers, 60 % CaCO3 filled PP/ABS(70/30) blend has good mechanical strength and processing fluidity.

     

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