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首页> 外文期刊>Journal of Applied Polymer Science >Thermal properties of silane-grafted water-crosslinked polyethylene
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Thermal properties of silane-grafted water-crosslinked polyethylene

机译：硅烷接枝的水交联聚乙烯的热性能

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Vinyl trimethoxysilane grafting reactions of low-density polyethylene (LDPE) were performed in an extruder, followed by crosslinking with boiled water. The thermal properties of both silane-grafted and silane-grafted water-crosslinked LDPE were investigated using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). DSC data showed that the silane grafts on the LDPE molecules were thermal stable in the absence of moisture under 130 degrees C under which the silane-grafted LDPE could be processed or recycled. The silane grafts on the LDPE molecules reduced the melting point of LDPE and gave rise to an endotherm shoulder at about 85 degrees C. TGA data showed that the decomposition temperature of the silane-grafted LDPE was much higher than that of LDPE. It was demonstrated that the cause of the increase in the decomposition temperature was not due to the silane grafts but due to the peroxide-induced crosslinking reactions during the silane grafting reactions performed in an extruder. Silane-grafted water-crosslinked LDPE displayed multiple melting behavior resulting from phase separation during crosslinking of LDPE with water. The phase separation gave rise to two melting points, including one at about 94 degrees C, and the other at about 107 degrees C. (C) 1998 John Wiley & Sons, Inc. [References: 11]
机译：在挤出机中进行低密度聚乙烯（LDPE）的乙烯基三甲氧基硅烷接枝反应，然后用开水交联。使用差示扫描量热法（DSC）和热重分析（TGA）研究了硅烷接枝和硅烷接枝的水交联LDPE的热性能。 DSC数据表明，在130℃下没有水分的情况下，LDPE分子上的硅烷接枝物是热稳定的，在该温度下可以对硅烷接枝的LDPE进行加工或回收。 LDPE分子上的硅烷接枝物降低了LDPE的熔点，并在约85摄氏度时产生了吸热肩峰。TGA数据表明，硅烷接枝的LDPE的分解温度比LDPE的分解温度高得多。已经证明，分解温度升高的原因不是由于硅烷接枝，而是由于在挤出机中进行的硅烷接枝反应期间过氧化物诱导的交联反应。硅烷接枝的水交联的LDPE表现出多种熔融行为，这是由于LDPE与水交联期间的相分离所致。相分离产生两个熔点，一个熔点在约94摄氏度，另一个在约107摄氏度。（C）1998 John Wiley＆Sons，Inc. [参考文献：11]

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