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OMMT对PTT/ASA体系相形态和性能的影响
Effect of OMMT on Morphology and Property of PTT/ASA Blends
【摘要】 用熔融插层法制备聚对苯二甲酸丙二醇酯(PTT)/丙烯腈-苯乙烯-丙烯酸酯三元共聚物(ASA)/有机蒙脱土(OMMT)复合材料,研究了OMMT对PTT/ASA体系相形态、结晶性能、流变性能和力学性能的影响。结果表明,OMMT主要以剥离态分布在PTT基体相和界面处,使ASA分散相的尺寸变小,体系的弹性模量和复数黏度得到提高;同时,OMMT是异相成核剂,使体系结晶峰向高温偏移;依据Palierne和Gramspacher-Meissner模型评估,发现OMMT可增大聚合物的界面模量和界面层厚度,在适量范围内使体系的拉伸强度和缺口冲击强度有所提高。
【Abstract】 Nanocomposites of poly(trimethylene-terephthalate)/poly(acrylonitrile-styrene-acrylate)/organic montmorillonite(PTT/ASA/OMMT) were prepared by means of melt-blending intercalation. The effect of OMMT contents on the phase morphology, crystallization behavior, rheological- and mechanicalproperties were investigated. The results show that the size of dispersed phases decreases with increasing OMMT content. The crystallization peak shifts to high temperature and melting peak moves to low temperature owing to the heterogeneous nucleation of OMMT. The exfoliated OMMT is located in the PTT matrix and at interface of PTT/ASA phases The rheological measurements show that the elastic modulus and complex viscosity increase with increasing OMMT content. The interfacial modulus and interfacial layer thickness predicted by Palierne and Gramspacher-Meissner models are enhanced by introduction of OMMT. The tensile strength and notched impact strength of blends increase with increasing OMMT content.
【Key words】 organic polymer materials; PTT/ASA blends; OMMT; morphology; rheology; mechanical property;
- 【文献出处】 材料研究学报 ,Chinese Journal of Materials Research , 编辑部邮箱 ,2014年02期
- 【分类号】TB33
- 【被引频次】2
- 【下载频次】139