摘要
用CaCO3对具有侧活性结构的室温固化耐高温有机硅树脂进行改性,制备了CaCO3/侧活性聚硅氧烷复合材料,研究了CaCO3用量对该复合材料的力学性能和耐热性能的影响。傅里叶变换红外光谱表征结果显示,CaCO3粒子表面的羟基与有机硅树脂上的羟基发生反应形成了牢固的化学键合;当CaCO3的用量(体积分数)为30%时,复合材料具有最高的冲击强度、拉伸强度和弯曲强度,分别为3.72kJ/m2、8.2MPa和17.9MPa,同时耐热性能得到提高。使用扫描电子显微镜观察有机硅树脂和复合材料的冲击断面时发现,复合材料的牵拉结构致密,基体塑性变形明显,复合材料得到增韧。
CaCO3/side -active polysiloxane corrqgosite was prepared by adding nano -CaCO3 to side - active thermal - resistant polysiloxane resin and being cured at room temperature. Effects of CaCO3 dosage on mechanical properties and thermal resistance of CaCO3/side - active polysiloxane composite were studied. F＇rlR results showed that hydroxyl groups on the surface of CaCO3 reacted with hydroxyl groups on polysiloxane resin, which led to forming strong chemical bonds. When volume fraction of CaCO3 in the composite is 30%, the impact strength, tensile strength and flexural strength of the composite are the maximums, namely 3.72 kJ/m^2, 8.2 MPa and 17.9 MPa respectively. At the same time, thermal resistance of CaCO3/side - active polysiloxane composite improves. Impact cross section SEM images of the composite indicate that pull structure of composite becomes denser and the plasticity deformation of the matrix becomes obvious, so the material is toughened.
出处
《石油化工》
EI
CAS
CSCD
北大核心
2007年第7期735-738,共4页
Petrochemical Technology
基金
北京市教委重点学科共建项目(XK100100433
XK100100540)
关键词
碳酸钙
侧活性聚硅氧烷
有机硅树脂
复合材料
力学性能
耐热性能
calcium carbonate
side - active polysiloxane
silicone resin
composite
mechanical property
thermal resistance
