天然橡胶/杜仲胶并用胶的交联密度与结晶度的关系及其对性能的影响  

Relationship between Crosslinking Density and Crystallinity of NR/EUG Blend and Their Effects on Properties

作　　者：徐志宇 康海澜 李东翰[1,2] 李政瀛 方庆红[1,2] XU Zhiyu;KANG Hailan;LI Donghan;LI Zhengying;FANG Qinghong(Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学材料科学与工程学院,辽宁沈阳110142 [2]沈阳化工大学辽宁省橡胶弹性体重点实验室,辽宁沈阳110142

出　　处：《橡胶工业》2023年第3期163-169,共7页China Rubber Industry

基　　金：国家自然科学基金资助项目(52073178);中国科学院战略性先导科技专项(A类)子课题(XDC06010206);辽宁省重点研发计划项目。

摘　　要：通过调整硫黄用量,研究天然橡胶(NR)/杜仲胶(EUG)并用胶的交联密度与结晶度的关系及其对并用胶性能的影响。结果表明:NR/EUG并用胶的交联密度与结晶度呈负相关;随着硫黄用量的增大,NR/EUG并用胶的交联密度增大,t_(10)略有缩短,t_(90)变化不大,硬度、耐屈挠性能和抗湿滑性能先提高后降低,滚动阻力和生热下降,储能模量波动减小;当硫黄用量为2~2.5份时,NR/EUG并用胶的交联密度和结晶度较大,物理性能、耐磨性能和抗湿滑性能较好。The relationship between the crosslinking density and crystallinity of natural rubber(NR)/eucommia ulmoides rubber(EUG)blend and their influence on the properties of the blend were studied by adjusting the sulfur dosage.The results showed that the crosslinking density of NR/EUG blend was negatively correlated with the crystallinity.With the increase of sulfur dosage,the crosslinking density of NR/EUG blend was increased,the t_(10)was slightly shortened,the t_(90)changed little,the hardness,flexural resistance and wet skid resistance increased at first and then decreased,the rolling resistance and heat buildup decreased,and the fluctuation of the storage modulus decreased.When the sulfur dosage was 2~2.5 phr,the crosslinking density and crystallinity of NR/EUG blend were larger,and the physical properties,wear resistance and wet skid resistance were better.

关 键 词：天然橡胶 杜仲胶 硫黄 交联密度 结晶度 耐磨性能 耐屈挠性能 动态力学性能 

分 类 号：TQ332.2[化学工程—橡胶工业] TQ332.6TQ330.385