无水硫酸钙晶须对PP复合材料的熔融结晶和力学性能的影响  

The Effect of Anhydrous Calcium Sulfate Whisker on the Mechanical Properties and Melting Crystallization of PP Composites

作　　者：杨红艳[1] 刘江[2] 周晓红 田瑶珠[1] 石文建[2] 秦军[2] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550003 [2]喀斯特环境与地质灾害防治教育部重点实验室(贵州大学),贵州贵阳550003 [3]贵州红林机械有限公司,贵州贵阳550009

出　　处：《塑料工业》2013年第7期87-90,126,共5页China Plastics Industry

基　　金：国家自然科学基金(21266005)

摘　　要：制备了无水硫酸钙晶须(ACSW)填充聚丙烯(PP)复合材料,通过差示扫描量热仪、X射线衍射仪、偏光显微镜、力学性能测试等手段研究了ACSW对PP复合材料的熔融结晶和力学性能的影响。结果表明,ACSW的加入会细化聚丙烯的晶粒,质量分数低于20%的ACSW提高了PP的结晶温度、熔融温度和结晶速率,降低复合材料的拉伸强度;质量分数大于20%的ACSW能提高PP复合材料β晶成核效率和PP的结晶速率,降低复合材料的拉伸强度。当ACSW质量分数为25%时,复合材料的缺口冲击强度较纯PP增加了66%。随着ACSW的含量的增加,复合材料的弯曲强度先增加后降低,并在ACSW质量分数为10%时达到了最大值。The ACSW filled PP composites were prepared. Studying the effect of anhydrous calcium sulfate whisker （ACSW） on the mechanical properties and melting crystallization of polypropylene composites by means of differential scanning calorimetry, X-ray diffraction, polarized light microscopy, mechanical properties testing. The results showed that the content which was below 20% of ACSW increased the crystallization and melt temperature as well as the crystallization rate of the composites while the tensile strength was decreased. When the content of ACSW was above 20% , it had the ability of forming/ β-crystal in the PP matrix, which also can improve the crystallization rate of composites, however, the tensile strength of composites decreased as the content increasing. The Izod impact strength of the composites reached at the maximum value when the content of ACSW reached at 25% which was increased by 66%. The bending strength of composites was improved and decreased with the content of ACSW increasing, and the excellent value was obtained under the condition of adding 10% ACSW.

关 键 词：无水硫酸钙晶须 聚丙烯 结晶 力学性能 Β晶 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]