Thermal crosslinking of ethene copolymers containing 1,2-cyclopropane units

详细信息    查看全文

• 作者：Gabriella Cavallo ; Vincenzo Venditto ; Liana Annunziata ; Stefania Pragliola ; Pasquale Longo ; Gaetano Guerra
• 关键词：Ethene copolymers ; Cyclopropane rings ; Crosslinked polyethene
• 刊名：Polymer
• 出版年：2005
• 出版时间：15 April 2005
• 年：2005
• 卷：46
• 期：9
• 页码：2847-2853
• 全文大小：189 K

文摘

The possibility to obtain crosslinked polyethene (XLPE) from new ethene copolymers containing cyclopropane rings (C3), synthesized by ethene/1,3-butadiene copolymerizations with a hindered metallocene catalyst, has been explored. In particular, the thermal crosslinking of these copolymers, for C3 molar content in the range 0.3–2.7 % , has been studied for annealing temperatures up to 200 °C and compared with the thermal behavior of other ethene–butadiene copolymers. Only for the ethene–C3 copolymers, the annealing procedures in the temperature range 160–200 °C lead to high gel fractions. These crosslinking processes occur in reasonable times and leave nearly unaltered the polymer crystallinity. Moreover, annealing procedures up to 140 °C do not produce appreciable crosslinking. All these features suggest that these new copolymers could be suitable for possible industrial fabrication processes of XLPE.