反式-1,4-聚异戊二烯/天然橡胶共混硫化胶的结晶行为  

Crystallization behavior of trans-1,4-polyisoprene/natural rubber blending vulcanizates

作　　者：马瑞泽 梁玉蓉[1,2] 王龙 郑慧文 王娜娜 苏俊东 MA Rui-ze;LIANG Yu-rong;WANG Long;ZHENG Hui-wen;WANG Na-na;SU Jun-dong(School of Materials Science and Engineering,North University of China,Taiyuan 030051,China;Department of Materials Engineering,Taiyuan Institute of Technology,Taiyuan 030008,China)

机构地区：[1]中北大学材料科学与工程学院,太原030051 [2]太原工业学院材料工程系,太原030008

出　　处：《合成橡胶工业》2024年第4期323-328,共6页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(51573124)。

摘　　要：通过控制反式-1,4-聚异戊二烯(TPI)与天然橡胶(NR)的配比制备了具有温度感应效应的TPI/NR共混硫化胶。研究表明,NR的加入降低了共混胶的X射线衍射峰强度,减小了其结晶焓和结晶度。随NR用量增加TPI/NR硫化胶的拉伸强度减小、扯断伸长率增大,断面颗粒物总体呈增多趋势。NR与TPI的相容性良好,共混胶的填料网络分散均匀,储能模量与损耗因子均随NR用量变化而变化。不同配比的共混胶都存在应力作用下的低温固定、高温回弹效应。加入NR对共混胶中β晶型的抑制作用更大,当其用量为30份(质量)时,共混胶中有X射线衍射峰消失,断面颗粒物最少,交联密度达到最大值。A temperature-sensitive trans-1,4-polyisoprene(TPI)/natural rubber(NR)blending vulcanizate was prepared by controlling the ratio of TPI to NR.The results showed that the addition of NR reduced the X-ray diffraction peak intensity,crystallization enthalpy,and crystallinity of the blends.As the amount of NR increased,tensile strength of the TPI/NR vulcanizate decreased,while elongation at break increased,and the overall trend of particle dispersion on the fracture surface showed an increasing tendency.NR and TPI exhibited good compatibility,resulting in uniform dispersion of filler networks in the blends,with both storage modulus and loss factor varying with the amount of NR used.Blends of different ratios exhibited low-temperature setting and high-temperature rebound effects under stress.The addition of NR had a greater inhibitory effect on theβ-crystalline phase in the blends.When its amount reached 30 phr(by mass),the X-ray diffraction peaks disappeared in the blends,with the smallest amount of particles on the fracture surface,and the highest crosslinking density.

关 键 词：反式-1 4-聚异戊二烯 天然橡胶 共混硫化胶 结晶行为 交联密度 

分 类 号：TQ333.3[化学工程—橡胶工业]