研究了可膨胀石墨(EG)的粒径及用量、EG/聚磷酸铵(APP)对氯化聚乙烯(CM)/乙烯-乙酸乙烯共聚物(EVA)热塑性硫化胶(TPV)力学性能及阻燃性能的影响.结果表明,随着EG粒径的增加,CM/EVA TPV的拉伸强度及扯断伸长率呈下降趋势,极限氧指数(LOI)增大,垂直燃烧测试均能达到V-0级别,800℃残炭量(CR800)增加;当EG的粒径为48 μm时,CM/EVA TPV的综合性能较佳.随着EG用量的增加,CM/EVA TPV的拉伸强度呈下降趋势,而100％定伸应力呈增加趋势,LOI增大,CR800增加.当EG/APP(质量比)为3/1时,CM/EVA TPV的拉伸强度为11.82 MPa,LOI为31.8％,垂直燃烧测试达到V-0级别,综合性能最佳.%Effect of particle size and amount of expandable graphite(EG) and EG/ammonium polyphosphate (APP) on mechanical properties and flame retardance of chlorinated polyethylene (CM) /ethylene-vinyl acetate copolymer (EVA) thermoplastic vulcanizates (TPV) were stu-died.The results showed that with the increase of EG particle size,tensile strength and elongation at break of CM/EVA TPV decreased,limiting oxygen index (LOI) increased,vertical burning test reached V-0 level and carbon residue at 800 ℃ (CR800) increased.When the particle size of EG was 48 pm,the comprehensive performance of CM/EVA TPV was the best.With the increase of EG content,the tensile strength of CM/EVA TPV showed a downward trend,while the modulus at 100％ showed an upword trend,LOI and CR800 increased.When the mass ratio of EG/APP was 3/1,tensile strength of CM/EVA TPV was 11.82 MPa,LOI was 31.8％,vertical combustion test reached V-0 level and the comprehensive performance was the best.
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