PA6-66-1010/MCPA6复合材料的结构与性能

采用原位聚合法制备了三元共聚尼龙6-66-1010(PA6-66-1010)与原位浇铸尼龙6(MCPA6)的共混复合材料。利用差示扫描量热法(DSC)、动态热机械分析(DMA)、力学性能测试和扫描电子显微镜(SEM)表征复合材料的结晶熔融行为、动态力学性能、力学性能及断裂破坏形貌。结果表明,PA6-66-1010的加入,使得复合材料中MCPA6分子间的氢键作用减弱、分子链活动性增加;复合材料的结晶温度、熔融温度、结晶度随着PA6-66-1010含量的增加而下降;PA6-66-1010的加入,破坏了MCPA6分子间氢键的规整性,使得复合材料韧性得到提高而强度变化不大;当PA6-66-1010含量为10%时,复合材料断裂伸长率提高近6倍。

Properties and Structure of PA6-66-1010/MCPA6 In Situ Blends

The blends composed of ternarypolymerization nylon(PA6-66-1010) and monomer casting polyamide 6(MCPA6) were obtained via the anionic polymerization.Various characterizations were conducted,including the analyses of crystallization and melting behaviors using differential scanning calorimetry(DSC),observation of morphology of fractured surface with scanning electron microscope(SEM),measurement of glass transition through dynamic mechanical analysis(DMA).The results suggest that crystallizing point,the fusion temperature,and the crystallinity of the blending decrease with the increase of PA6-66-1010.In addition,the blending system is toughed with the content of PA6-66-1010 increasing.Especially,the percentage of breaking-elongation of the bends is increased by 6 times when PA6-66-1010 content is 10%.PA6-66-1010 has the significant effect on percentage of breaking-elongation and toughness of the bends.