天然橡胶/反式-1,4-聚异戊二烯并用胶的制备及性能研究  

Preparation and Properties of NR/TPI Blends

作　　者：祝欣欣 玄璐佳 崔凯文 桂红星[2] 王洪振[1,2] ZHU Xinxin;XUAN Lujia;CUI Kaiwen;GUI Hongxing;WANG Hongzhen(Qingdao University of Science and Technology,Qingdao 266042,China;Rubber Research Institute,Chinese Academy of Tropical Agricultural Sciences,Haikou 571101,China)

机构地区：[1]青岛科技大学高分子科学与工程学院,山东青岛266042 [2]中国热带农业科学院橡胶研究所,海南海口571101

出　　处：《橡胶工业》2024年第3期183-190,共8页China Rubber Industry

基　　金：国家重点研发计划项目(2022YFD2301204)。

摘　　要：制备减震制品用天然橡胶(NR)/反式1,4-聚异戊二烯(TPI)并用胶,并研究天然TPI(杜仲胶和古塔波胶)和合成TPI(牌号TPI-28,TPI-58,TPI-80)对NR/TPI并用胶性能的影响。结果表明:合成TPI的结晶度高于天然TPI;天然TPI和合成TPI对NR/TPI混炼胶的加工安全性和硫化速率的影响十分微小;与NR硫化胶相比,NR/TPI硫化胶的邵尔A型硬度和100%定伸应力提高,回弹值增大,压缩永久变形减小,阻尼性能提高,动态生热降低,耐热空气老化性能改善,耐疲劳性能显著提高,尤其是NR/TPI-28硫化胶的六级屈挠龟裂疲劳次数和伸张疲劳次数分别达到100万和近200万。NR/TPI并用胶可显著延长减震制品的使用寿命。Natural rubber(NR)/trans-1,4-polyisoprene(TPI)blends for shock-absorbing products were prepared,and the effects of natural TPI(Eucommia ulmoides rubber and Guttapo rubber)and synthetic TPI(grades TPI-28,TPI-58,TPI-80)on the properties of NR/TPI blends were studied.The results showed that the crystallinities of synthesized TPI were higher than those of natural TPI.Both natural TPI and synthetic TPI had very little impact on the processing safety and vulcanization rates of NR/TPI compounds.Compared with NR vulcanizate,NR/TPI vulcanizates had higher Shore A hardnesses and moduli at 100%elongation,larger rebound values,smaller compression sets,better damping performance,lower dynamic heat generation,perferred heat resistance to air aging,and significantly improved fatigue resistance.In particular,the number of times of six level flexural cracking fatigue and tensile fatigue of NR/TPI-28 vulcanizate were over one million and nearly two million respectively.NR/TPI-28 blend could significantly prolong the service life of shock-absorbing products.

关 键 词：反式-1 4-聚异戊二烯 天然橡胶 微晶结构 阻尼性能 耐疲劳性能 

分 类 号：TQ333.3[化学工程—橡胶工业] TQ332.1