第40卷，第6期 2012年6月
doi:10.3969/j.issn.1001-3539.2012.06.005
工程塑料应用
ENGINEERING PLASTICS APPLICATION
VoL.40,No.6 Jun.2012
偶联剂表面处理纳米SiC改性氰酸酯树脂的耐热性研究
张文根，张学英，祝保林
（渭南师范学院复合材料研究所，消南714000）
摘要：采用模塑成型法制备氟酸酯（CE）/纳来SiC复合材料，通过热失重（TG)分析和动态机械分析(DMA)，分别考察了小分子硅烷偶联剂KH-560和大分子硅烷偶联剂SCA-3表面处理纳来SiC对CE耐热性的影响。结果表明，两种偶联剂均能有效地提高其耐热性，在小于400℃的低温区SCA-3的改性效果优于KH-560，但在400~750℃C的高温区相反，其耐热性的高低与复合材料储能模量（E")有关；相对纯CE，纳来SiC的质量分数为1%时，经KH-560 和SCA-3表面处理的纳来SiC改性的CE/纳来SiC复合材料的玻璃化转变温度提高率分别为16.71%和18.29%，质量保持率为95%的热分解温度提高率分别为17.25%和13.87%，450C时质量保持率的提高率分别为59.67%和 42.99%，E%1500MPa时对应温度的提高率分别为16.03%和17.58%。
关键词：氧酸酯树脂；偶联剂；纳米SiC；耐热性
中图分类号：TB332
文献标识码：A
文章编号：1001-3539(2012)06-0021-04
Study on Heat Resistance of CE Modified byNano-SiC Treated withCouplingAgents
Zhang Wengen, Zhang Xueying, Zhu Baolin
(Composite Research Institution,，Weinan Teachers College,Weinan714000,China）
21
Abstract : The CE / nano-SiC composites were made by moulding. Influences of the nano-SiC that was treated with silanc coupling agent KH-560 and SCA-3 on the heat resistance of the composites were investigated through discussion of TG analysis and DMA. The results indicated that these coupling agents could both efficiently improve the heat resistance of the composites. When the temperature was <400°C, which was called low-temperature zone, SCA-3 did well in improving the heat resistance of the eneoeaoos the heat-resistant was related to the storage modulus(E'). Compared with pure CE, when the mass fraction of nano-SiC was 1.00%, the T, of the composites respectively modified by KH-560 and SCA-3 had increased 16.71% and 18.29%, the heat-degradation temperature improved 17.25% and 13.87% when the mass loss of the composites was 5%, the quality maintaining rate separately increasced 59.67% and 42.99% when the temperature was 450 C, and he temperature increased 16.03% and 17.58% when E' was about 1500 MPa.
Keywords : CE; coupling agent; nano-SiC; heat resistance
氰酸酯树脂（CE）是自20世纪70年代继环氧树脂(EP)和双马来酰亚胺树脂(BMI)之后开发的，其韧性和耐热性的改性一直受到人们的关注"。到目前为止，用热固性工程塑料、热塑性工程塑料、橡胶弹性体、含不饱和双键化合物等与CE共混或共聚已取得了较大进展(2-4)。但在无机纳米粒子改性方面，却有很多不尽人意之处。除了进展缓慢之外，其纳米粒子品种的选择十分单，文献报道的研究主要集中在纳米SiO,对CE改性方面[5-12],致使在实际应用上比较筛选的余地非常狭窄。为了拓宽纳米粒子品种的研究范围，笔者课题组曾利用纳米 SiC对CE复合材料进行过改性探讨[13-14],发现当
纳米SiC质量分数为1.00%时，改性体系的力学性能最佳。笔者在此基础上，进一步探讨两种不同硅烷偶联剂KH-560和SCA-3表面处理纳米SiC后对CE耐热性的影响，为偶联剂的筛选打好基础。 1实验部分
1.1主要原材料
双酚A型CE：白色颗粒，工业品，熔点74℃，*陕西省科技计划项目和陕西省教育厅专项科研基金项目
(2010 K06-07,2010 JK547)
联系人：张文根，教授，长期从事氰酸酯基纳米复合材料研究工作
收稿日期：2012-03-15