镧化合物改性超细碳酸钙对玻纤增强PET结晶性能和力学性能的影响  

Effect of Ultra-Fine CaCO_3 Modified by La^(3+) on Crystallization Property and Mechanical Property of Glass Fiber Reinforced PET

作　　者：郭涛[1] 王炼石[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：《中国稀土学报》2004年第4期453-457,共5页Journal of the Chinese Society of Rare Earths

基　　金：广东省自然科学基金(31366)资助项目

摘　　要：采用双螺杆挤出制备了玻璃纤维增强PET(FRPET)/稀土镧化合物改性超细碳酸钙(UCaC03一La3’)复合材料,将UCaCO3-La3+对FRPET性能的影响与有机钠盐类成核剂NA做了对比。DSC分析结果表明,各成核剂均使FRPET的结晶温度和结晶度提高,结晶峰半峰宽变窄,熔融峰半峰宽变宽,且镧化合物对FRPET的双熔融峰有引发作用。根据过冷温度和过热温度,成核剂的结晶成核能力大小顺序为UCaCO3-5La3+>UCaCO3-10La3+>NA>UCaCO3-1La3+。UCaCO3-La3+的加入明显提高了FRPET的力学性能,并对FRPET综合性能的改善具有显著效果。The composite of glass fiber reinforced PET (FRPET)/Ultra-fine CaCO3 modified by La3+ (UCa-CO3-La3 + ) was prepared by twin screw extrusion. Effects of UCaCO3-La3 + on properties of FRPET in comparison with an organic nucleating agent (NA) was discussed. Results of differential scanning calorimetry (DSC) show that compared with pure FRPET, nucleated PET show a higher crystallization temperature and crystallinity, a more narrow half-height width of crystal- lization peak and a more wide half-height width of heating peak, and the double melting peak of FRPET could be initiated by compound of lanthanum. According to the temperature of supercooling and superheating, the order of nucleating ability of nucleating agents is as follows: UCaCO3-5La3+ > UCaCO3-10La3+ > NA > UCa-CO3-lLa3+ . The presence of UCaCO3-La3 + can improve the mechanical property and synthetical properties of FRPEET obviously.

关 键 词：无机非金属材料 镧化合物 超细碳酸钙 PET 结晶性能 力学性能 稀土 

分 类 号：O614.33[理学—无机化学] O631.2[理学—化学]