摘要
为改善SiO2在三元乙丙橡胶(EPDM)复合材料中的分散性并获得良好界面性能,通过传统自由基聚合法合成了一系列不同接枝率的大分子偶联剂,即EPDM、甲基丙烯酸甲酯(MMA)和γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)的三元共聚物。采用不同接枝率的大分子偶联剂对SiO2/EPDM复合材料进行改性。通过FTIR、1 H-NMR、TGA、DMA和SEM对三元共聚物的结构和SiO2/EPDM复合材料的性能进行研究。结果表明:添加了大分子偶联剂的SiO2/EPDM复合材料的相容性得到了显著改善,拉伸强度和撕裂强度比未经偶联剂处理的SiO2/EPDM复合材料分别提高了109.4%和44.0%;SiO2表面改性后的SiO2/EPDM复合材料的储能模量和玻璃化转变温度有所升高。
To obtain good dispersion and interface properties of SiO2 in ethylene-propylene-diene monomer （EP- DM） composites, a series of macromolecular coupling agents with different grafting ratios were synthesized by conventional free radical polymerization, that is EPDM, methyl methacrylate （MMA） and γ-methacryloxypropyltrime- thoxy silane （KH-570） terpolymer. The macromolecular coupling agents with different grafting ratios were used to modify SiO2/EPDM composites. FTIR, 1 H-NMR, TGA, DMA and SEM were used to characterize the structure of terpolymer and properties of SiO2/EPDM composites. The results show that the compatibility of SiO2/EPDM composites is improved significantly after SiO2 surface treated by maeromolecular coupling agent. The tensile and tear strength of SiO2/EPDM composites is increased up to 109.4% and 44.0%respectively when comparing with the composites without coupling agent. The storage modulus and glass transition temperature of SiO2/EPDM composites have been increased after SiO2 surface treatment.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2015年第4期969-976,共8页
Acta Materiae Compositae Sinica
基金
国家自然科学基金青年基金(51203015)
中国博士后科学基金(2014M551602)
江苏省产学研前瞻项目(BY2014037-05
BY2013024-21)
江苏省工业支撑计划(BE2014821)
关键词
三元乙丙橡胶
SIO2
复合材料
界面
接枝率
大分子偶联剂
相容性
ethylene-propylene-diene monomer
SiO2
composites
interface
grafting ratio
ingmacromolecularcoupling agent
compatibility
