摘要
采用胶乳共混法制备天然橡胶/二氧化硅(NR/SiO2)纳米复合材料。先用硅烷偶联剂KH-570对纳米二氧化硅进行改性,再经乳液聚合接枝上聚甲基丙烯酸甲酯(PMMA)得到PMMA-SiO2粒子,最后将其与用MMA改性的天然胶乳(NR-PMMA)共混制得NR/SiO2纳米复合材料。采用红外光谱仪、透射电镜、扫描电镜、热重分析仪、橡胶拉伸测试机对样品进行了表征。实验结果表明,PMMA成功地接枝于SiO2表面,PMMA-SiO2在橡胶基体中分散均匀,平均粒径在60nm～80nm之间,复合材料的拉伸强度比纯的NR提高了35%,定伸应力也有显著提高。
Natural rubber/nanosilica（NR/SiO2） composite was developed with latex compounding techniques.SiO2 was firstly modified by KH570,and then grafted with polymethyl methacrylate （PMMA） through polymerization in order to obtain SiO2-PMMA nanoparticles.Finally,NR/SiO2 nanocomposites were formed,blending SiO2-PMMA with NR-PMMA.The Fourier transform infrared spectroscopy （FT-IR）,transmission electron microscopy （TEM）,scanning electron microscopy （SEM）,thermal gravimetric analysis （TGA） and mechanical characterization results showed that PMMA has been successfully introduced onto the surface of SiO2.SiO2-PMMA nanoparticles are homogenously distributed throughout NR matrix,with the average particle range from 60 nm to 80 nm.The tensile strength of NR/SiO2 composite,compared to the pure NR,is enhanced by 35%.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2010年第6期152-154,158,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(50763006)
科技部科研院所技术开发研究专项资金(2008EG134285)资助
海南省自然科学基金资助项目(807048)
中国热带农业科学院橡胶研究所基本科研业务费专项资金(XJSYWFZX2008-30)
