钛酸钾晶须增强不饱和聚酯树脂的力学性能.pdf

第40卷,第8期
工.程塑料应用
2012年8月
ENGINEERING PLASTICS APPLICATION
Aug,2012
doi:10.3969/ssn.1001-3539.2012,08.004
钛酸钾晶须增强不饱和聚酯树脂的力学性能
刘琳2,侯非2
先进土木工程材料教育部重点实验室,上海201804;2.同济大学材料科学与工程学院,上海201804)
摘要:应用硅婗偶联剂、硬脂酸和钛酸酯偶联剂对钛酸钾晶须(PIW)进行表面处理,考察了偶联剂种类和钛酸
钾晶须用量对不饱和聚酯树脂(UP)/PTW复合材料力学性能的影响,用扫描电子显微镜观察了純UP及UP/PTW
复合材料的断面形貌。结果表明,用3种偶联剂表面改性的PTW能够显著提高UP的力学性能,其中以硬脂酸为最好。
经过硬脂酸表面改性的PTW能够較好地分散在树脂基体中,当硬脂酸表面改性的PTW质量分数为2.5%时,UP/
PTW复合材料的拉伸强度和冲击强度分别提高约57%和39%。
关键词:钛酸钾晶须;不饱和聚酯树脂;硬脂酸;力学性能
中图分类号:1TB321,TQ323.42文献标识码:A文章编号:1001-3539(2012)08-0020-03
Mechanical Properties of Potassium Titanate Whiskers Reinforced Unsaturated Polyester Resin
F
I. Key Labora ory of Advanced Civil Engineering Materials, Ministry of Education, Shanghai 201804. China
2. School of Material Science and Engineering, Tongji University, Shanghai 201804, China
Abstract: Surface modification of potassium titanate whiskers(PTW)with three kinds of coupling agent of silane
stearic acid and titanate was studied. The efects of PTW content and the three coupling agents on the mechanical properties of
the unsaturated polyester resin (UP )/PTW composites were studied. The fracture morphologies of UP and UP/ PTW composites
were characterized by EM. The experimental results showed that the mechanical properties of UP were improved significantly
when adding PTW modified with the three coupling aents, particularly the effect of stearic acid was the best. PT W modified with
tearic acid could disperse homogenously in the P, when the mass fraction of PTW modified with stearic acid was 2.5, the tensile
strength and impact strength of UP/PT W composite were improved by 57% and 39
Keywords: potassium titanate whisker; unsaturated polyester resin; stearic acid; mechanical property
不饱和聚酯树脂(UP)作为一种热固性材料,
过氧化环己酮、环烷酸钴:上海新华树脂厂
具有质轻、耐腐蚀、电绝缘、价格低廉等优点,其发
PTW:工业品,上海晶链冶金材料科技有限公
展迅速,目前我国UP的产量已超过百万吨。但其司
固化物硬而脆、冲击性能差、收缩率高达6%~7%,
硅烷偶联剂:KH-570,分析纯,上海耀华化工
使其应用受到一定限制。因此UP的政性和増强增厂
韧研究一直受到关注2!。钛酸钾晶须(PTW)是
钛酸酯偶联剂:NDZ-201,分析纯,南京曙光化
种新型针状短纤维,是新一代高性能复合材料增强工厂;
剂,具有优良的力学性能,且物理性能、化学性能稳
硬脂酸:分析纯,国药控股有限公司;
定,耐腐蚀性良好,耐磨。目前,PTW已广泛用于
丙酮:化学纯,国药控股有限公司。
聚丙烯、聚氯乙烯、尼龙、聚碳酸酯及环氧树脂等的1.2主要仪器与设备
增强?。但PTW增强UP的研究未见报道。笔者
摆锤式简支梁冲击试验机:XCJ-50型,承德市
根据PTW独特的针状短纤维特征,将其进行表面宝华电器有限公司;
改性后加入UP中,以期提高UP的力学性能。
电子拉力试验机:RGT-5A型,深圳市瑞格尔
1实验部分
联系人:刘琳,副教授,工学博土,主要从事功能高分子的合成和
主要原材料
改性等方面的研究
UP:307-3,上海新华树脂厂;
收稿日期:2012-05-14