合成橡胶工业 |
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用黏度法测定稀土顺丁橡胶的相对分子质量 高红艳 马凤云 宋玉萍 王雪枫 王凤江 摘 要:用黏度法(外推法或一点法)测定了中国石油独山子石化公司研究院中试装置生产的稀土顺丁橡胶(NdBR)的特性黏数([η]),研究了温度、初始浓度对测定结果的影响,最终由Mark-Houwink方程计算其黏均分子量,并与镍系顺丁橡胶(NiBR)进行了比较.结果表明,NdBR的黏均分子量为28.0×10~4~34.3×10~4,高于NiBR(24.6×10~4);用一点法测定NdBR的[η]比外推法更简便快捷,二者的相对误差不超过4.0%,因而可用一点法替代外推法进行NdBR黏均分子量的测定. Determination of relative molecular mass of rare earth-based cis-1,4-polybutadiene rubber by viscosimetry Gao Hongyan(College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China) Ma Fengyun(College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China) Song Yuping(Institute of Dushanzi Petrochemical Company, PetroChina, Dushanzi 833600, China) Wang Xuefeng(College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China) Wang Fengjiang(Institute of Dushanzi Petrochemical Company, PetroChina, Dushanzi 833600, China) Abstract:Intrinsic viscosity([η]) of the rare earth-based cis-1,4-polybutadiene rubber (NdBR) produced by pilot plant of Institute of Dushanzi Petrochemical Company was determinated with viscometry, that was extrapolation method or one-point method. The influences of temperature and initial concentration of NdBR on [η] was studied. The viscosity-average molecular mass of NdBR was finally calculated by the Mark-Houwink equation and compared with nickel-based cis-1,4-polybutadiene(NiBR). The results showed that the viscosity-average molecular mass of NdBR was between 28.0×10~4~34.3×10~4, which was higher than that of NiBR(24.6×10~4). One-point method used in determining [η] of NdBR was more simple and quick than extrapolation method. The relative error of the two methods was less than 4.0%. So one-point method could replace extrapolation method to determine the viscosity-average molecular mass of NdBR. |
基金项目:国家科技支撑计划资助项目(2007 BAE 32 B 00). 作者简介:高红艳(1982-),女,硕士. 作者单位:高红艳(新疆大学,化学化工学院,新疆,乌鲁木齐830046) 马凤云(新疆大学,化学化工学院,新疆,乌鲁木齐830046) 宋玉萍(中国石油独山子石化公司,研究院,新疆,独山子833600) 王雪枫(新疆大学,化学化工学院,新疆,乌鲁木齐830046) 王凤江(中国石油独山子石化公司,研究院,新疆,独山子833600) 参考文献:
[1]杨树田.钕系顺丁橡胶性能试验[J].轮胎工业,1999,19(1):14-16. |
收稿日期:2008年12月10日 修稿日期:2010年1月21日 出版日期:2010年3月15日 |