摘要
以马来酸酐接枝共聚改性环氧基腰果壳油（M-CNSL）作为反应性增塑剂,研究M-CNSL用量对丁苯橡胶（SBR）硫化特性、物理性能和耐热空气老化性能的影响,并与芳烃油和未改性腰果壳油（CNSL）进行对比试验.结果表明：不同增塑剂对SBR的增塑作用从大到小依次为CNSL、芳烃油、M-CNSL,而其硫化胶的耐热空气老化性能没有明显差别;加入CNSL的SBR胶料焦烧时间和正硫化时间显著延长,硫化胶硬度、100％定伸应力较小,拉断伸长率较大;在0～25份用量范围内,添加CNSL或M-CNSL的硫化胶拉伸强度和撕裂强度均出现一个最大值,而添加芳烃油的硫化胶拉伸强度和撕裂强度随着增塑剂用量的增大而减小.硫化胶拉伸断面扫描电镜分析结果表明,M-CNSL的加入有利于白炭黑在胶料中的分散,起到了相容作用.
A reactive plasticizer, M-CNSL（modified cashew nut shell liquid）, was prepared by graft-copolymerization of maleic anhydride and epoxy-cashew nut shell liquid copolymer, and the effects of M-CNSL on the properties of SBR, such as curing behavior, physical properties and resistance to hot aging were studied. Meanwhile,the result was compared with that of aromatic oil and unmodified-CNSL as plasticizer. The results showed that the plasticizing effect was in the descending order of CNSL, aromatic oil and M-CNSL. There was no significant difference in the hot aging resistance. With the addition of CNSL,the scorch time and curing time of SBR compound were prolonged, the hardness and modulus at 100% elongation of SBR vulcanizate decreased, and the elongation at break increased. Within 25 phr of plasticizer,the tensile strength and tearing strength of SBR vulcanizates showed peak values when the addition amount of CNSL or M-CNSL increased. However, the ten- sile strength and tearing strength of SBR vulcanizates containing aromatic oil decreased with the increase of addition level of aromatic oil. SEM photograph of the tensile fractured surface of SBR vulcanizates indicated that the silica dispersion was improved with M-CNSL as plasticizer.
出处
《橡胶工业》
CAS
北大核心
2014年第11期666-670,共5页
China Rubber Industry
