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《工程塑料应用》 2022年第01期
DOI:10.3969/j.issn.1001-3539.2022.01.004
氰酸酯树脂/表面多步接枝改性γ-Si3N4复合材料制备及性能
胡明1,祝保林2
1.渭南师范学院环境与生命科学学院,陕西渭南 714099; 2.华南师范大学(汕尾校区)材料与新能源学院,广东汕尾 516600 
Preparation and Performances of Cyanate Ester Resin/γ-Si3N4 Modified by Multi-step Surface Grafting Composites
Hu Ming1, Zhu Baolin2
1. School of Environment and Life Sciences, Weinan Normal University, Weinan 714099, China; 2. School of Materials and New Energy, South China Normal University (Shanwei Campus), Shanwei 516600, China 
摘要:通过硅烷偶联剂A-1120对立方氮化硅(γ-Si3N4)粒子进行表面初步接枝,再以甲基丙烯酸甲酯(MMA)单体对经过初步接枝的γ-Si3N4粒子进行表面二次接枝,实现了对该粒子的表面多步接枝改性。将改性后粒子加入氰酸酯树脂(CE)中,制备了CE/γ-Si3N4复合材料,考察了CE/γ-Si3N4复合体系的黏度变化,表征了复合材料的力学性能、热稳定性和介电性能。结果表明,经表面多步接枝后γ-Si3N4粒子的加入,使复合材料的综合性能得到了改善,一方面其力学性能、热稳定性、介电性能较纯CE固化物得以提高,另一方面,复合体系的黏度较低,更有利于复合材料固化工艺的优化。当经过两次表面接枝改性的γ-Si3N4(记作SN3)粒子用量达到CE单体质量5%时,复合材料的冲击强度由纯CE固化物的8.42 kJ/m2提高到15.84 kJ/m2,提升了88.12%;当SN3粒子用量达到6%时,弯曲强度由82.56 MPa提高到156.53 MPa,提升了89.60%,复合材料热失重5%的温度由392.6℃上升到467.8℃,提高了19.2%,600℃质量保持率由51.5%上升至67.2%,提高了30.5%,介电常数增大23.8%,介电损耗正切值减小63.2%。 
Abstract:The surface of cubic silicon nitride (γ-Si3N4) particles was preliminarily treated with silane coupling agent A-1120, Then, the surface of γ-Si3N4 particles after preliminary organic treatment was subjected to secondary organic treatment with methyl methacrylate (MMA) monomer, multi-step surface grafting modifications of the particles were realized. Cyanate ester resin (CE)/γ-Si3N4 composites were prepared by adding the modified particles into the matrix resin CE. The viscosity changes of CE/γ-Si3N4 system were investigated, the mechanical properties, thermal stability and dielectric properties of the composites were characterized. The results show that the addition of γ-Si3N4 particles after multi-step surface grafting improves the comprehensive properties of the composites. On the one hand, the thermal stability, mechanical and dielectric properties of the composites are higher than those of the pure CE cured products, on the other hand, the viscosity of CE/γ-Si3N4 system is low, which is more conducive to the optimization of composite curing process. When the content of γ-Si3N4 (recorded as SN3) particles after twice surface grafting modification reaches 5% of CE monomer mass, the impact strength of the composite increases from 8.42 kJ/m2 (pure CE cured product) to 15.84 kJ/m2, which increases by 88.12%. When the content of SN3 particles reaches 6%, the flexural strength increases from 82.56 MPa to 156.53 MPa, an increase of 89.60%, the temperature at 5% weight loss increases from 392.6℃to 467.8℃, increased by 19.2%, the quality retention rate at 600℃ increases from 51.5% to 67.2%, an increase of 30.5%, the dielectric constant increases by 23.8% and the dielectric loss tangent decreases by 63.2%. 
关键词:立方氮化硅(γ-Si3N4);氰酸酯树脂;表面接枝改性;力学性能;热稳定性;介电性能 
Keywords:cubic silicon nitride (γ-Si3N4); cyanate ester resin; surface grafting modification; mechanical property; thermal stability; dielectric property 
基金:国家级新农科项目、陕西省新农科项目:《地方高校农业资源与环境专业产学研协同创新育人机制探索与实践》,广西省科技厅重点项目(2017AB53025),陕西省教育厅专项基金(201118197) 
本文引用格式:
胡明,祝保林.氰酸酯树脂/表面多步接枝改性γ-Si3N4复合材料制备及性能[J].工程塑料应用,2022,50(1):21-27.
Hu Ming,Zhu Baolin. Preparation and performances of cyanate ester resin/γ-Si3N4 modified by multi-step surface grafting composites[J]. Engineering Plastics Application,2022,50(1):21-27. 

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