伸张疲劳对丁苯橡胶/反式-1,4-聚异戊二烯并用硫化胶结构和性能的影响  

Influence of Tensile Fatigue on the Structure and Properties of SBR/ Trans-1,4-Polyisoprene Blend Vulcanizates

作　　者：张钰[1] 杨晨燕[1] 高文廷[1] 杜爱华[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《高分子材料科学与工程》2013年第6期84-87,91,共5页Polymer Materials Science & Engineering

基　　金：山东省教育厅资助(BS2009CL024);国家自然科学基金资助项目(51073085)

摘　　要：研究伸张疲劳对炭黑填充丁苯橡胶(SBR)硫化胶及SBR/反式-1,4-聚异戊二烯(TPI)(质量比80/20,下同)并用硫化胶交联结构、动态性能和并用胶中TPI结晶性能的影响。结果表明,随着疲劳次数的增加,SBR硫化胶的拉伸强度、交联密度均大幅下降,tanδ峰值和E′小幅下降;而SBR/TPI硫化胶性能下降幅度较小,tanδ峰值和E′在疲劳初期有所下降;增加疲劳次数,TPI结晶衍射峰0.47nm对应的峰强不断减弱,0.39nm对应的峰强不断增强,同时在疲劳100万次时,SBR/TPI(80/20)硫化胶在晶面间距0.76nm处出现了新的结晶衍射峰。Influence of tensile fatigue on crosslink structure, dynamic properties and trans-1,4-polyisoprene（TPI） crystallinity of CB filled SBR vulcanizates and styrene-butadiene rubber （SI3R）/TPI （ mass ratio of 80/20） blend vulcanizates was investigated. The results show that, with increase of fatigue cycles, tensile strength and crosslink density of SBR vulcanizates drop substantially, tan δ peak and E＇ fall slightly. While the performance of SBR/TPI blend vulcanizates does not change significantly, and tan δ peak and E＇ decrease slightly at the early stage of the fatigue tests. The intensity of crystallization diffraction peak at 0.47 nm decreases gradually as the fatigue cycles increase, with strength of 0.39 nm diffraction peak increasing. At the same time, while fatigue cycles increase to 1 million times, a new crystal diffraction peak appears at 0.76 nm interplanar spacing place.

关 键 词：反式-1 4-聚异戊二烯 结晶性 伸张疲劳 动态性能 

分 类 号：TQ333.1[化学工程—橡胶工业]