改性丁基橡胶PMIIR的动态力学性能研究  

Dynamic properties of modified butyl rubber

作　　者：王燕霞[1] 张恩华[1] 付超[1] 于方琪 赵季若[1] 冯莺[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/山东省橡塑材料与工程重点实验室,山东青岛266042

出　　处：《弹性体》2013年第5期1-6,共6页China Elastomerics

基　　金：国家自然科学基金(51173088)

摘　　要：采用氢化钠(NaH)/马来酸酐(MAH)体系和无溶剂的本体方法,在橡胶加工设备中对丁基橡胶(IIR)进行了多官能化改性反应,得到了加工改性丁基橡胶(PMIIR)。通过红外光谱对产物结构进行了分析表征,该反应在丁基橡胶分子链上同时引入了不饱和的碳碳双键和羧基官能团。采用动态机械分析(DMA)和橡胶加工分析(RPA)方法对PMIIR的动态力学性能进行了分析。结果表明,混炼胶在低应变和高应变时储能模量的差值(ΔG′)受改性剂用量的影响不大,而硫化胶的ΔG′随改性剂用量的增加而增加,说明改性剂的用量对硫化体系网络有一定影响,IIR中引入极性基团,橡胶与填料的相互作用增强。硫化胶的动态模量受应变影响较大,随应变增加而大幅降低,损耗因子随应变的增加而增加。Modified butyl rubber（PMIIR）with multifunctional groups was obtained using NaH/MAH modified system and solvent-free technology in rubber processing equipment.The structure of product was confirmed by infrared spectrum.The results showed that the double bond and carboxyl group were introduced onto molecular chain of IIR.The dynamic mechanical properties of PMIIR were analyzed by DMA and RPA methods.It is found that the △G＇ of rubber compounds is little dependent on modifier dosage,but the △G＇ of vulcanized rubbers decreases with the increase of modifier dosage.This illustrates the dosage of modifier has certain effect on vulcanization system network,and due to the introduction of polar groups in IIR,the interaction between rubber and filler enhances.The dynamic modulus of vulcanized rubber reduce with the increase of strain,on the contrary,the loss factor increases.

关 键 词：丁基橡胶 硫化特性 力学性能 PAYNE效应 

分 类 号：TQ333.6[化学工程—橡胶工业]