偶联剂处理针状硅灰石及PP复合材料的研究.pdf

第42卷第12期
塑料工业
2014年12月
CHINA PLASTICS INDUSTRY
料助剂偶联剂处理针状硅灰石及P复合材料的研究
与配混
赵梓年“,梁李爽,吕爱龙
(天津科技大学材料科学与化学工程学院,天津300457)
摘要:采用硅烷倜联剂(KH550、KHS70)、钛酸酯偶联剂(ND-201)和铝酸酯偶联剂(DL411-A)对针状硅
灰石表面进行处理,并进一步与聚丙烯(PP)进行填充改性。通过红外光谱、扫描电子显微镜对处理效果及PP/硅灰
石体系进行了表征,对力学性能进行了測试。结果表明:四种偶联剂与硅灰石发生了化学作用,而且偶联剂KH570
和DL-41-A对硅灰石的处理效果较佳。当KH570质量分数为2.0%、DL-411-A质量分数为1.5%时,PP/桂灰石体系
的拉伸强度均达到最大值,同时提高了硅灰石在PP基体中的分散及其与PP基体的界面相容性。
关键词:硅灰石:聚丙烯;表面处理;偶联剂;力学性能;相容性
DOI:10.3969/f.isn.1005-5770.2014.12.022
中图分类号:TQ325.1
文献标识码:A
文章编号:1005-5770(2014)12-0087-06
Study on the Coupling Agent Treatment on the Needle-like Wollastonite
and Polypropylene Composite
ZHAO Zi-nian, LIANG Li-shuang, LV Ai-long
( College of Material Science and Chemical Engineering, Tianjin University of Science&Technology, Tianjin 300457, China
Abstract In this paper, needle-like wollastonite was surface treated using silane coupling agent
(KH550, KH570), titanate coupling agent(ndz-201 and aluminum coupling agent(dl-411-a), and
filled modification with polypropylene (PP) The treatment effect and the PP/wollastonite systems were
characterized with the infrared spectroscopy (FTIR and seanning electron microscopy(SEM). In
addition, the mechanical properties of composites were tested. The results showed that the four kinds of
coupling agents existed chemical reaction with wollastonite, and the activation index showed the coupling
agent KH570 and DL-411-A had better effeet upon surface modification in wollastonite. When the KH570 and
DL-4I1-A ratio were 2.0 wt% and 1. 5 wt% respectively, the tensile strength of the PP/wollastonite system
reached the maximum value. At the same time, the wollastonite had better dispersion and interface
compatibility with the matrix of PP
Keywords Wollastonite; Polypropylene; Surface Modification; Coupling Agent; M
echanic
Property; Compatibility
佳灰石( Casio32)是一种链状、钙质偏佳酸盐缩率
矿物,具有低吸水性、化学稳定性好、价格低廉
刘新海等?发现硅灰石改性产品表面由亲水性
和机械性能优良等性能。形态上与短玻纤、晶须等类变为疏水性,并且用这种硅灰石改性的PP具有良好
似,生产成本则与CaCO2相当,因此有望成为一种新的补强特性。李建杰等发现改性硅灰石填充PP
型的高性价比的増强填料。硅灰石在P中的应用是对PP的耐热性和耐寒性有明显的改善。单传省?制
近年来的研究热点之一2。聚内烯(PP)是一种成备P/硅灰石,实验得出硅灰石改性后有效地提高了
本低、性能优异、用途广泛的高分子材料。PP/硅灰复合体系的强度和韧性。 Dasari等研究了PP/硅
石复合材料熔体流动性好、加工容易,可改善制品表灰石的防刮擦性能。结果表明,硅灰石粒子对P有
面光滑性,提高材料的热稳定性,降低成型收增强作用。周晓东等”的实验表明硅烷偶联剂处理
通信作者Znzhao@tust.edu.cn
作者简介:梁李爽,女,1988年生,硕士研究生,主要从事高分子材料的合成与改性研究。