摘要
在Haake转矩流变仪的热机械作用下,用对苯乙烯磺酸钠(NASS)对炭黑进行预处理,制备了在水介质中具有优异的分散稳定性的亲水性纳米炭黑粒子(PNASS-CB),并将其直接用于天然橡胶胶乳的补强研究.1HNMR和FT-IR结果表明NASS在炭黑表面成功聚合包覆,用热重分析方法计算其包覆率为8.1 wt%,接枝率为2.5 wt%.亲水性炭黑的表面自由能降低,同时,Payne效应和结合胶含量表明亲水性炭黑粒子与橡胶的相互作用强于亲水性炭黑粒子之间的相互作用.因此,亲水性炭黑/天然橡胶胶乳复合材料的硫化时间变短,转化速度加快,硫化胶的撕裂强度提高了85%,拉伸强度提高了30%,断裂伸长率提高了20%.
A novel strategy of radical polymerization of sodium 4-styrenesulfonate（NASS） on the surface of carbon black（CB） in solid state is developed to prepare water-dispersible carbon nanoparticles（PNASS-CB）.A high performance of natural rubber latex（NRL）/PNASS-CB composite is gained by latex compounding technique.Proton nuclear magnetic resonance（1H-NMR） results show the presence of PNASS chains on the surface of CB,and the encapsulating ratio is 8.1 wt% and grafting ratio is 2.5 wt% by TGA.The surface energy of PNASS-CB was decreased,the interaction between carbon black was weakened,and the carbon-rubber interaction was enhanced.And the carbon nanoparticles are uniformly dispersed in the composite as the result of RPA.When compared to the NRL/pristine CB composite,the tear strength,tensile strength and elongation at break of the obtained composite are increased by 85%,30% and 20%,respectively.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2009年第11期1101-1106,共6页
Acta Polymerica Sinica
基金
国家自然科学基金面上项目(基金号50873032)资助
关键词
热机械作用
对乙烯苯磺酸钠
天然橡胶胶乳
硫化性能
力学性能
Thermo-mechanical
Sodium 4-styrenesulfonate
Natural rubber latex
Cure properties
Mechanical properties
