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Title:: Comparative analysis of nitrile rubber 1906 produced by Lanzhou Petrochemical Company and similar products

作者:: 赵洪国1; 徐典宏1; 陈阳2; 黄溪岱1; 周雷1; 李彤3; 王凯4; 钟启林1?鄢; 1. 中国石油石油化工研究院兰州化工研究中心/甘肃省合成橡胶工程技术研究中心，兰州 730060； 2. 四川宝石机械专用车有限公司，四川德阳 618300； 3. 华油阳光（北京）商贸有限责任公司，北京 100101； 4. 中国石油技术开发有限公司，北京 100101

Author(s):: ZHAO Hong-guo1; XU Dian-hong1; CHEN Yang2; HUANG Xi-dai1; ZHOU Lei1; LI Tong3; WANG Kai4; ZHONG Qi-lin1; 1. Synthetic Rubber Technology Innovation Center of Gansu Province/Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, China; 2. Sichuan BOMCO Special Vehicle Manufacturing Co Ltd, Deyang 618300, China; 3. Huayou Sunshine (Beijing) Trading Co Ltd, Beijing 100101, China; 4. China Petroleum Technology Development Co Ltd, Beijing 100101, China

Keywords:: nitrile rubber; NBR 1906; comparative analysis; stress relaxation; compression permanent set; cold resistance coefficient

摘要:: 考察了中国石油兰州石化公司生产的丁腈橡胶（NBR） 1906的序列结构、微观组成、分子量、加工性能，以及硫化胶的耐低温性能和抗压缩永久变形等性能，并与同类产品镇江南帝化工有限公司（简称南帝）和南京金浦英萨合成橡胶有限公司（简称英萨）生产的NBR 1965进行了对比剖析。结果表明，三种产品的丙烯腈结构单元均呈无规化分布，其中NBR 1906的BBB序列结构含量略低、柔顺性略差。NBR 1906的分子量及其分布与对比产品基本相当，其反式-1，4-结构质量分数高约4%，顺式-1，4-结构质量分数低约33%，但加工性能略优。NBR 1906的平坦硫化期与南帝NBR 1965相当，优于英萨产品，且无硫化返原现象。NBR 1906的拉伸强度较英萨NBR 1965高约9%，但较南帝产品低约5%；交联密度和压缩永久变形与对比产品处于同一水平，但-40 ℃以下的压缩耐寒系数略逊于对比产品。

Abstract:: The sequence structure, microstructure, molecular weight, processing performance, as well as low temperature resistance and compression permanent set of nitrile rubber (NBR) 1906 produced by Lanzhou Petrochemical Company were investiga-ted, and comparative analysized with similar products such as NBR 1965 produced by Zhenjiang Nandi Chemical Co Ltd (referred to as Nandi) and Nanjing Jinpu Insa Synthetic Rubber Co Ltd (referred to as Insa). The results showed that the acrylonitrile structural units of the three products were all randomly distributed, with NBR 1906 having a slightly lower BBB sequence structure content and slightly poorer flexibility. Molecular weight and its distribution of NBR 1906 were basically equivalent to the compared products, with a mass fraction of trans-1,4-unit about 4% higher and a mass fraction of cis-1,4-unit about 33% lower, but slightly better processing performance. The flat vulcanization period of NBR 1906 was comparable to that of Nandi NBR 1965, superior to that of Insa products, and there was no vulcanization reversion phenomenon. Tensile strength of NBR 1906 was about 9% higher than that of Insa NBR 1965, but about 5% lower than that of Nandi pro-duct. The crosslinking density and compression permanent set were at the same level as the comparison products, but the compression cold resistance coefficient below -40 ℃ was slightly inferior to that of the comparison products.