不饱和聚酯/热塑性聚氨酯/甘蔗纤维复合材料的结构与性能  

Structure and Properties of Unsaturated Polyester/Thermoplastic Polyurethane/Bagasse Composites

作　　者：游长江[1] 谢青[1] 曾一铮[1] 李瑶[1] 贾德民[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《高分子材料科学与工程》2011年第6期53-56,共4页Polymer Materials Science & Engineering

基　　金：广东省自然科学基金团队资助项目(39172)

摘　　要：研究了NaOH和丙烯酸改性甘蔗纤维与热塑性聚氨酯(TPU)对不饱和聚酯(UPR)/,TPU/甘蔗纤维复合材料力学性能的影响。采用热重分析(TGA)方法进行表征,用扫描电镜观察了复合材料冲击断面的形貌,并测试了复合材料的力学性能。结果表明,加入适量改性甘蔗纤维提高了UPR复合材料的拉伸强度、弯曲强度和热稳定性,但降低了冲击强度;TPU的加入大幅度提高了复合材料的冲击强度,但降低了拉伸强度、弯曲强度和热稳定性。当改性甘蔗纤维与TPU并用时,对UPR起到很好的增强和增韧效果。扫描电镜(SEM)揭示,TPU进一步提高了改性甘蔗纤维与UPR之间的相容性。The effects of NaOH and acrylic acid （AA） modified bagasse on the structure and properties of unsaturated polyester （UPR） composites were investigated by thermogravimetric analysis （TGA）, scanning electron microscope （SEM） and mechanical testing. The results show that the addition of suitable amount of bagasse fiber enhances the tensile strength, flexural strength and heat stability of the composites but decreases the impact strength, while thermoplastic polyurethane （TPU） increases markedly the impact strength but decreases the tensile strength, flexural strength and heat stability of the composites. The use of bagasse fiber and TPU together has good reinforcement and toughness effect on UPR. The results of SEM reveal that TPU further increases the compatibility between UPR and modified bagasse fiber.

关 键 词：甘蔗纤维 热塑性聚氨酯 不饱和聚酯 复合材料 

分 类 号：O631.11[理学—高分子化学]