铁系3,4-聚异戊二烯橡胶的性能  

The properties of iron-based 3,4-polyisoprene

作　　者：葛建宁[1] 李柏林[2] 董为民[2] 张新惠[2] 于琦周[2] 任慧娟[1] 姜连升[2] 张学全[2] 

机构地区：[1]长春工业大学,吉林长春130012 [2]中国科学院长春应用化学研究所,吉林长春130022

出　　处：《弹性体》2007年第1期45-47,共3页China Elastomerics

基　　金：吉林省科技发展计划项目(200505254)

摘　　要：考察了以异辛酸铁、三异丁基铝和偶氮二异丁腈催化剂在己烷中50℃下制备的3,4-聚异戊二烯(3,4-IR)[3,4(+1,2)结构质量分数约为50%,ML110+04℃为52,玻璃化转变温度为-21.6℃]与SBR或NR质量比为20/80组成的共混胶的力学性能和粘弹性能。SBR/3,4-IR和NR/3,4-IR共混胶与SBR或NR相比,其拉伸强度和扯断伸长率有所下降,回弹性明显降低,但硬度基本不变。根据0℃和60℃下的损耗因子tanδ值可知,3,4-IR可明显提高SBR或NR硫化胶的抗湿滑性能,并使滚动阻力有所降低。Polyisoprene （3,4-IR） with 3,4 （ ＋ 1,2） content about 50 %, Mooney viscosity of 52, glass transition temperature of -21.6 ℃ was prepared with the catalyst composed of Fe 2-ethylhexanoate,Al（i-Bu）3 and AIBN in hexane at 50 ℃. The physical-mechanical properties and viscoelastic properties of 20 phr 3,4-IR blends of SBR or NR were studied. The blends exhibited lower tensile strength and elongation at break,apparently less rebound,comparable hardness when compared with NR or SBR. According to the tan 8 value at 0 ℃ and 60℃ ,3,4-IR obviously improved wet-skid resistance and slightly decreased rolling resistance for SBR or NR.

关 键 词：3 4-聚异戊二烯 天然橡胶 丁苯橡胶 共混胶 力学性能 粘弹性能 

分 类 号：TQ333.3[化学工程—橡胶工业]