高耐磨炭黑填充型粉末NR研究 (Ⅲ)硫化胶的物理机械性能  

Study on carbon black filled powdered NR (Ⅲ) Mechanical properties

作　　者：王炼石[1] 米雄飞[1] 张安强[1] 

机构地区：[1]华南理工大学材料学院高分子系,广东广州510640

出　　处：《弹性体》2006年第6期1-5,共5页China Elastomerics

基　　金：国家自然科学基金资助项目(59773010);广东省自然科学基金资助项目(031366;0400016);华南理工大学自然科学基金资助项目(324-E5040160)

摘　　要：研究了高耐磨炭黑(N330)填充型粉末天然橡胶[P(NR/N330)]硫化胶的物理机械性能。结果发现炭黑乳化剂、炭黑、操作油和包覆剂的用量及玻璃化转变温度对P(NR/N330)硫化胶的物理机械性能的影响比较明显。在适宜的粉末化条件下制备的P(NR/N330),其硫化胶的物理机械性能优于天然胶乳与炭黑的简单共沉胶(ENR/N330),而300%定伸应力则低于块状NR/N330机械混炼胶(MNR/N330)。P(NR/N330)硫化胶拉伸断面形貌的SEM分析表明,包覆剂在用量为15份时,与NR基体形成互锁结构;DSC分析表明,二者部分相容,因此硫化胶具有较好的物理机械性能。The mechanical properties of carbon black(HAF,grade N330)filled powdered NR[P(NR/N330)]vulcanizates were studied.The results showed that the content of the emulsifier,carbon black,carbon black modifier and encapsulant,and the Tg of encapsulant affect greatly the mechanical properties of P(NR/N330) vulcanizates,which under suitable powdering conditions are comparable to those of bale NR/N330 vulcanizates prepared by conventional mechanical mixing.The analysis on SEM showed that the carbon black particles have good boundary adhesion with the rubber matrix as the content of the encapsulant is 15 phr,at this content,the encapsulant and N330 could form the feasible granularity in the NR matrix,and form the co-penetrate structure,which contribute to the better mechanical properties of P(NR/N330).

关 键 词：高耐磨炭黑 填充型粉末天然橡胶 硫化 物理机械性能 拉伸断面形貌 

分 类 号：TQ330.38[化学工程—橡胶工业] TQ333.1