硅烷偶联剂KH-550在聚丙烯/酸式二溴新戊二醇磷酸二酯中的增容作用

Compatibility of KH-550 Silane Coupling Agent on Polypropylene/Phosphate Ester Dibromoneopentyl Glycol Acid

考察了硅烷偶联剂KH-550在聚丙烯(PP)/酸式二溴新戊二醇磷酸二酯(PEA)复合体系中的增容作用。力学性能、形态结构和流变行为的研究均表明硅烷偶联剂KH-550是该体系有效增容剂,能提高材料的综合性能。PP/PEA/KH-550=90/10/0.5时复合体系综合性能最佳,冲击强度和拉伸强度比PP/PEA分别提高了34.2%和7.0%。扫描电镜显示KH-550的加入使粒子与基体间的黏结作用加强。偏光显微分析表明随着KH-550的增加,球晶的大小趋于一致,PEA的分散趋于均匀。流变行为表明,加入PEA使体系黏度降低,但当KH-550添加量为0.5%时,流体黏度有所增加。阻燃性能的测试结果表明KH-550的加入,可提高材料的阻燃性。

The effect of silane coupling agent KH-550 as a compatibilizer in polypropylene （PP）/phosphate ester dibromoneopentyl glycol acid （PEA） composites was studied. A recipe of PP/PEA/KH-550 = 90/10/0. 5 was found to be the optimal. Compared with neat PP/PEA composites, the tensile strength and impact strength were improved by 34.2 % and 7.0 %, respectively. SEM showed the adhesion between PEA and PP was enhanced by KH-550. POM showed that the size of the spherulites of PP and the dispersed PEA particles became more uniform with the inclusion of KH-550. Flow tests showed that the apparent viscosity decreased by adding PEA. But when 0.5 % KH-550 was added, the viscosity of the composites increased. The flame retardancy of the composites was aim improved when KH-550 was added.