摘要
用含羧基、烯丙基和丁基3种不同特征官能团的季磷盐制备了有机蒙脱土(OMMT),并用其与聚碳酸酯(PC)熔融共混挤出,制备了3种不同的OMMT/PC复合材料。采用弯曲测试、拉伸测试、热重分析测试探究了不同官能团的OMMT对PC复合材料的力学性能和热稳定性能的影响。结果表明:含羧基的OMMT与PC分子链间能形成强的氢键,提高OMMT在PC分子中的分散作用,有效延缓OMMT/PC复合材料热降解过程,提高材料的热稳定性,复合材料的热分解温度提高了4℃;OMMT/PC的弯曲强度为93.16 MPa,提高了8.6%;复合材料的拉伸强度无明显变化,断裂伸长率略有下降。说明含不同特征官能团的OMMT对OMMT/PC的弯曲性能和热稳定性有不同程度的影响,对材料的拉伸性能无明显影响。
The organic montmorillonite(OMMT)was prepared from quaternary phosphorus salts containing three different functional groups such as carboxyl,allyl and butyl,and was fused with polycarbonate(PC)to extrude three different OMMT/PC composites.Bending tests,tensile tests,and thermogravimetric analysis tests were employed to explore the effects of different functional groups of OMMT on the mechanical properties and thermal stability of PC composites.Results show that the carboxyl-containing OMMT can form a strong hydrogen bond with the PC molecular chain,which can improve the dispersion of OMMT in the PC molecule,effectively delay the thermal degradation process of OMMT/PC composites,and improve the thermal stability,and thermal decomposition temperature is increased by 4℃;the flexural strength is 93.16 MPa,an increase of 8.6%;it has no obvious effect on the tensile properties,and elongation at break decreases slightly.It proves that OMMT with different functional groups can improve the bending properties and thermal stability of OMMT/PC in different degrees,but has no obvious effect on the tensile properties of OMMT/PC.
作者
陈福德
母汶汶
胡馨悦
张坤
马寒冰
CHEN Fude;MU Wenwen;HU Xinyue;ZHANG Kun;MA Hanbing(School of Materials and Chemistry,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China)
出处
《西南科技大学学报》
CAS
2022年第3期14-20,共7页
Journal of Southwest University of Science and Technology
基金
四川省科技厅项目(2019ZDZX0027,2019YFG0514,2020YFG0147)。
关键词
季磷盐
蒙脱土
聚碳酸酯
热分解温度
力学性能
Quaternary phosphorus salts
Montmorillonite
Polycarbonate
Thermal decomposition temperature
Mechanical properties
