UP/GF/LCPU原位混杂复合材料动态力学性能  

Dynamic mechanical properties of UP/GF/LCPU in-situ hybrid composites

作　　者：韦春[1] 于贤保[1] 傅裕[1] 吕建[1] 钟锦标[1] 

机构地区：[1]桂林工学院材料与化学工程系有色金属及材料加工新技术教育部重点实验室,广西桂林541004

出　　处：《材料科学与工艺》2008年第3期389-391,共3页Materials Science and Technology

基　　金：国家自然科学基金资助项目(50473060;50763001);广西壮族自治区自然科学基金(0728223);广西壮族自治区应用基础研究专项(0731002;0836016);广西壮族自治区教育创新人才基地资助项目

摘　　要：为了改进不饱和聚酯树脂在高低温和交变应力下力学性能和热稳定性较差的缺点,利用自行合成的端基含有活性基团的热致性液晶聚合物(LCPU)对不饱和聚酯(UP)/玻璃纤维(GF)复合材料改性,用DMA测试了共混物的动态力学性能,用扫描电镜(SEM)对材料断面的形态结构进行了研究.结果表明,加入一定量的LCPU,复合材料的动态力学性能得到一定改善,材料的冲击强度和弯曲强度得到明显的提高,其中冲击强度最大提高了16%,弯曲强度最大提高36%,弯曲模量最大提高61%,材料的应力-应变行为得到改善,而LCPU的含量对材料的硬度影响不大;LCPU的加入对提高材料的断裂能具有一定的作用.In order to improve the mechanical properties and thermal stability of UP, in-situ hybrid composites of thermotropic liquid crystalline polymer （LCPU） with the group of-NCO synthesized by us, unsaturated polyester （UP） and glass fiber （GF） were successfully prepared by melt mixing technology and compression molding. The mechanical properties, dynamic mechanical properties and the morphologies of these in-situ hybrid composites were studied by static mechanics analysis, dynamic mechanical analysis （DMA） and scanning electron microscope （SEM） respectively. Results show that the dynamic mechanical properties of the composite are improved by adding a certain amount of LCPU. The impact strength,the bending strength and the bending modulus are increased 16% ,36% and 61% in maximum, respectively. The stress-strain behavior of the composite is also improved. The addition of LCPU has little influence on the hardness, while affects the fracture energy of the composite to some extent.

关 键 词：热致性液晶 不饱和聚酯 动态力学性能 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]