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Water Crosslinking Reactions of Silane-Grafted Polyolefin Blends

机译:硅烷接枝的聚烯烃共混物的水交联反应

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摘要

Water crosslinkingreactions ofLDPE, PP, LLDPE, and the LDPE/PP and LDPE/LLDPE blends are investigated. Degrees ofcrossliriking of these samples are quantitatively compared and discussed in detail in terms of crosslinking ability, phase- separationbehavior, molecular weight (or viscosity), morphology of the constituents in blends, or in the pure state. It is found that PP gives negligible crosslinking reactions in the pure state and in blends with LDPE. LDPE and LLDPE are both capable of giving considerable degrees of crosslinking, with LLDPE giving a higher degree of crosslinking than LDPE at all conditions studied. Degrees of crosslinking of the LDPE/ LLDPE blends are not linearly but are zigzagly related to the compositions of the blends with the LDPE/LLDPE = 50/50 blend giving a relatively high degree of crosslinking at 100, 120, and 140°C for a certain time except the condition at 140degC for 12 h compared with the LDPE/LLDPE = 75/25 and 25/75 blends.
机译:研究了LDPE,PP,LLDPE以及LDPE / PP和LDPE / LLDPE共混物的水交联反应。对这些样品的交叉吸附程度进行了定量比较,并就交联能力,相分离行为,分子量(或粘度),共混物中的组分形态或纯净状态进行了详细讨论。发现PP在纯态下与LDPE共混时交联反应可忽略不计。 LDPE和LLDPE都能够提供相当程度的交联,在所有研究的条件下,LLDPE都比LDPE提供更高的交联度。 LDPE / LLDPE共混物的交联度不是线性的,但与LDPE / LLDPE = 50/50共混物的混合物的组成呈锯齿状相关,从而在100、120和140°C时具有相对较高的交联度。除了在LDPE / LLDPE = 75/25和25/75共混物的条件下在140摄氏度下保持12小时以外,还需要一定的时间。

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