老化条件对天然生胶塑性保持率(PRI)的影响  

Effects of Aging Conditions on Plasticity Retention Index of Natural Rubber

作　　者：梁亚平[1] 罗吉良[1] 诸志刚 商伟俊 刘英武[1] 

机构地区：[1]广州市华南橡胶轮胎有限公司,广东广州511400

出　　处：《合成材料老化与应用》2012年第4期21-24,共4页Synthetic Materials Aging and Application

摘　　要：天然生胶塑性保持率PRI是加热老化30min后塑性值P30与未老化试样的塑性值P0之比乘以100。结果表明,在P0相同的条件下,P30在一定温度范围内随老化温度的升高,呈现下降趋势;在老化温度一致的情况下P30随老化时间的延长而降低。在P0相同的情况下,PRI与P30成正比,PRI在一定程度上也随老化温度的升高和老化时间的延长,呈现下降趋势。Plasticity retention index（PRI） of raw natural rubber is plastic value（P30） after 30min heat aging divided by plastic value（P0） without heat aging and multiplied by 100.The results show that P30 is decreased with temperature increasing in a certain temperature rang and with the aging time increasing at the same aging temperature.At the same conditions of P0,PRI is in inverse proportion to P30 and PRI is decreasing with aging temperature increasing and with aging time increasing to some extent.

关 键 词：天然胶 塑性保持率 加热老化30min后塑性值 未老化试样的塑性值 

分 类 号：TQ332[化学工程—橡胶工业]