摘要
将炭黑DZ 13、N 330和N 660及改性的白炭黑TB2和通用白炭黑填充的天然橡胶(NR)在二甲苯中于不同温度下进行离解,外推其离解温度,并通过傅里叶变换红外光谱和热重分析等手段判断填料与橡胶分子链之间的界面结合强度。结果发现,利用溶剂溶胀法外推出的炭黑DZ 13/NR、炭黑N 330/NR和炭黑N 660/NR的结合胶完全离解温度分别为360,334,220℃,表明炭黑DZ 13与NR的化学结合力较强。虽然白炭黑/NR结合胶的离解曲线与炭黑结合胶有所不同,但其外推的完全离解温度均比炭黑低,说明改性白炭黑随着温度的升高,其表面的改性剂在溶剂中被逐渐溶解,从而造成了橡胶分子链的脱离。
Natural rubbers（NR） filled with carbon black （DZ 13, N 330 and N 660） , modified silica（TB2 ） and gen- eral silica were dissociated in xylene at different temperatures to extrapolate their complete dissociation temperatures. Fou- rier transform infrared spectroscopy and thermogravimetric analysis were used to characterize the interface bonding strengh between fillers and rubber. The results showed that the complete dissociation temperatures of bound rubbers of DZ 13/NR, N 330/NR and N 660/NR extrapolated by thermal swelling dissociation in solvent were 360, 334, 220 ℃ re- spectively, indicating DZ 13 had stronger chemical bonding force with NR. The dissociation curves of silica/NR bound rubber were different from those of carbon black/NR bound rubber, and the complete dissociation temperatures of silica/ NR bound rubber were all lower than those of carbon black/ NR bound rubber, which could be attributed to the gradual solution of modifier on the surface of silica in solvent with the increase of temperature, thus resulting in the separation of NR molecular chains.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2013年第4期289-292,共4页
China Synthetic Rubber Industry
基金
国家自然科学基金资助项目(51072125)
自贡市重点科技项目(2011 G 043)
关键词
炭黑
天然橡胶
热胀离解
白炭黑
作用力
carbon black
natural rubber
thermal swell-ing dissociation
silica
interaction force
