点击反应接枝蓖麻油基聚氨酯的合成及其阻尼性能研究  

Synthesis of click reaction grafted castor oil-based polyurethane and study on its damping properties

作　　者：任凯 江盛玲[1,2] 祝跃旺 曹成林 孙昊一 REN Kai;JIANG Sheng-ling;ZHU Yue-wang;CAO Cheng-lin;SUN Hao-yi(Carbon Fiber and Functional Polymers Key Laboratory of the Ministry of Education,Beijing University of Chemical Technology,Beijing 100029,China;College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学,碳纤维及功能高分子教育部重点实验室,北京100029 [2]北京化工大学材料科学与工程学院,北京100029

出　　处：《现代化工》2023年第5期184-187,194,共5页Modern Chemical Industry

摘　　要：通过硫醇-烯点击反应将正十二硫醇接枝到蓖麻油中,成功合成了一种含有大量支链的蓖麻油(MCO)。以蓖麻油(MCO)为软段、二苯基甲烷二异氰酸酯(MDI50)为硬段、乙二醇(EG)为扩链剂合成生物基聚氨酯。通过核磁共振氢谱(1HNMR)和傅里叶变换光谱(FT-IR)对其进行表征。动态力学分析(DMA)结果表明,随着正十二硫醇接枝量的增加,蓖麻油基聚氨酯有效阻尼温域由34.3℃(17.1~51.4℃)提高到74℃(-8.3~65.7℃),阻尼温域大幅提高,同时阻尼温域向低温方向移动了25.4℃,有效覆盖了阻尼材料的使用温度,拓展了材料的使用环境和应用领域。Castor oil(MCO)containing a large number of branched chains is successfully synthesized through grafting n-dodecanethiol into castor oil via a thiol-ene click reaction.Furthermore,bio-based polyurethane is synthesized by taking MCO as the soft segment,diphenylmethane diisocyanate(MDI50)as the hard segment,and ethylene glycol as the chain extender.Characterization by hydrogen nuclear magnetic resonance spectroscopy(1 H-NMR)and Fourier transform spectroscopy(FT-IR)reveals the successful synthesis of biobased polyurethanes.Dynamic mechanical analysis(DMA)results show that with the increase of the grafting amount of n-dodecanethiol,the effective damping temperature range of castor oil-based polyurethane increases from 34.3℃(17.1-51.4℃)to 74℃(-8.3-65.7℃).The damping temperature range is greatly improved,and moves towards low temperature direction by 25.4℃,which effectively covers the use temperature of the damping material and expands the use environment and application field of the material.

关 键 词：生物基聚氨酯 阻尼材料 阻尼改性 点击反应 悬挂链 

分 类 号：TQ334.1[化学工程—橡胶工业]