不同法尼烯含量的法尼烯/异戊二烯共聚橡胶的合成与表征  

Synthesis and Characterization of Farnesene/Isoprene Copolymerized Rubber with Different Farnesene Contents

作　　者：张献辉 隋晓飞 匡佳 ZHANG Xian-hui;SUI Xiao-fei;KUANG Jia(China National Chemical Group Shuguang Rubber Industry Research and Design Institute Co.,Ltd.,Guilin 541000,Guangxi,China;Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266100,Shandong,China;Shandong Linglong Rubber&Technology Co.,Ltd.,Yantai 264006,Shandong,China)

机构地区：[1]中国化工集团曙光橡胶工业研究设计院有限公司,广西桂林541000 [2]中国科学院青岛生物能源与过程研究所,山东青岛266100 [3]山东玲珑橡胶科技有限公司,山东烟台264006

出　　处：《合成材料老化与应用》2024年第3期3-6,54,共5页Synthetic Materials Aging and Application

基　　金：广西重点研发计划(桂科AB21196038);广西人才专项项目(桂科AD21238015)。

摘　　要：通过铁系配位聚合制备获得了不同法尼烯含量的法尼烯/异戊二烯共聚橡胶,系统探究了法尼烯用量对聚合反应活性、微观结构、分子量、玻璃化转变温度(Tg)的影响,通过核磁共振定量碳谱确定了法尼烯/异戊二烯共聚橡胶的微观结构分析计算方法。研究结果表明:法尼烯单体的引入会明显降低聚合反应活性,法尼烯/异戊二烯共聚比例为3:7的反应收率降低至57%,法尼烯均聚的反应收率仅达到32%。法尼烯的引入对于聚合物的分子量及分子量分布没有明显影响,但是随着法尼烯含量的增加,玻璃化转变温度逐渐降低,聚法尼烯的T_(g)可达-70.1℃。相较于聚法尼烯和聚异戊二烯,共聚橡胶的3,4结构比例都有一定程度的增加。不同共聚物中的法尼烯比例都明显大于反应比例。Farnesene/isoprene copolymerized rubber with varying farnesene content was synthesized via iron coordination polymerization.The impact of farnesene dosage on polymerization reactivity,microstructure,molecular weight and glass transition temperature(Tg)was investigated.The microstructure analysis and calculation method for farnesene/isoprene copolymerized rubber were determined using quantitative carbon spectroscopy of nuclear magnetic resonance.Results demonstrated that the incorporation of farnesene monomer significantly reduced the polymerization activity,resulting in a decrease in the yield of farnesene/isoprene copolymerization ratio(3:7)to 57%,while the yield of farnesene homopolymerization was only 32%.However,the introduction of farnesene had no significant effect on the molecular weight and molecular weight distribution,while with the increase of farnesene content of the polymer,the glass transition temperature gradually decreased,and the T_(g)of polyfarnesene reached-70.1℃.Furthermore,compared to polyfarnesene and polyisoprene,there was an observed increase in the proportion of 3,4 structure within the copolymerized rubber.Additionally,it should be noted that the ratios of farnesene in dierent copolymers were noticeably higher than their respective reaction ratios.

关 键 词：法尼烯 异戊二烯 配位聚合 定量碳谱 

分 类 号：TQ333[化学工程—橡胶工业]