尼龙6/笼形八苯基硅倍半氧烷复合材料的结构与性能

以熔融混合方法制备了尼龙6/笼形八苯基硅倍半氧烷(PA6/OPS)复合材料,并采用扫描电子显微镜、偏光显微镜、示差扫描量热(DSC)、X 射线衍射(XRD)等方法对复合材料的形态、力学性能、疏水性能及结晶性能进行了研究。实验结果表明,OPS在 PA6基体中形成团聚体,当 OPS 质量分数为2%时,PA6/OPS 复合材料的拉伸强度和屈服强度较 PA6有所改善,断裂伸长率和弹性模量明显提高;添加 OPS 增大了 PA6的水接触角,降低了相对吸水率,即提高了 PA6的疏水性;OPS 使 PA6的球晶尺寸减小,球晶的数量增多;添加 OPS 后,PA6存在两种晶型,结晶温度向高温方向移动,OPS 在 PA6基体中起到成核剂的作用。

Structure and Performance of Polyamide 6/Octaphenyl Silsesquioxane Composites

The polyamide 6/octaphenyl-polyhedral oligomeric silsesquioxane cages(PA6/OPS) composites were prepared via molten blending.The morphology,mechanical properties, hydrophobicity and crystallization behavior of the composites were studied by means of SEM, polarizing microscope(PLM),DSC and XRD.OPS formed aggregates in PA6 matrix when mass fraction of former was 2%.Both tensile strength and yield strength of the composite were improved in comparing with PA6.Elongation at break and Young modulus increased obviously.The enlargement of water contact angles and the lowering of relative absorptivities indicated that existence of OPS raised the hydrophobicities of composites.The crystalline particle size of PA6 became smaller and the particle quantities increased.After addition of OPS,PA6 formed two types of crystals and the crystallization temperature shifted to higher.OPS particles acted as nucleating seed in the PA6 matrix.