交联密度对氢化丁腈橡胶热性能的影响  

Effect of Crosslink Density on Thermal Property of HNBR

作　　者：董慧民[1] 李敏婷[1] 刘晓丹[1] 张成龙[1] 李再峰[1] 

机构地区：[1]青岛科技大学生态化工国家重点实验室培育基地,山东青岛266042

出　　处：《特种橡胶制品》2010年第5期19-21,共3页Special Purpose Rubber Products

基　　金：山东省自然科学基金(Y2008B08);山东省教育厅科技发展计划(J08LC08)

摘　　要：用核磁共振法(NMR)测定了氢化丁腈橡胶(HNBR)的横向弛豫时间(T21),用以反映硫化胶的交联密度,并研究了交联密度对硫化胶热性能和力学性能的影响。结果表明:随着硫化剂DCP用量的增多,胶料交联密度增大,玻璃化转变温度升高,耐热性提高,拉伸强度先增大后减小,拉断伸长率、永久变形和撕裂强度明显减小。The crosslink densities of HNBR vulcanizates were reflected by transversal relaxation time（T21） of HNBR which was measured by pulsed nuclear magnetic resonance（NMR）.The effect of the crosslink density on the mechanical and thermal properties of HNBR vulcanizates were investigated through the tensile testing machine,thermogravimetric analysis（TGA） and differential scanning calorimetry（DSC） as well.It was found that with the amount of DCP increased,the crosslink densities,Tg,thermal decomposition onset temperature and the maximum weight loss velocity temperature of HNBR vulcanizates was improved and the tensile strength was increased at first and then decreased.The elongation at break and tear strength were decreased.

关 键 词：氢化丁腈橡胶 交联密度 热性能 力学性能 

分 类 号：TQ330.1[化学工程—橡胶工业]