Abstract - NR latex vulcanisation - Prevulcanisation and post-vulcanisation of dipped NR latex films


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	Publications of MRB Latest Publications MRB Digest Journal of Rubber Research 3^rd Qtr 2008 Vol 11(3) 2^nd Qtr 2008 Vol 11(2) 1^st Qtr 2008 Vol 11(1) 4^th Qtr 2007 Vol 10(4) 3^rd Qtr 2007 Vol 10(3) 2^nd Qtr 2007 Vol 10(2) 1^st Qtr 2007 Vol 10(1) 1^st Qtr 2006 Vol 9(1) 2^nd Qtr 2006 Vol 9(2) 3^rd Qtr 2006 Vol 9(3) 4^th Qtr 2006 Vol 9(4) Submit paper/article Order Form	Abstract NR Latex Vulcanisation - Prevulcanisation and Post-vulcanisation of Dipped NR Latex Films The tensile properties results of NR dipped latex films prepared by prevulcanisation process and post-vulcanisation imply that the standing period during the latex stage dominates the extent of crosslinking in the latex films. Further crosslinking does not seem to occur in dry latex films as reflected by its modulus values. The results support the idea that most crosslinking in NR latex occurs during the latex stage. Leaching improves the tensile strength and modulus when the latex films were conditioned under low humidity. The presence of water in the dry latex films during leaching may indicate water as a medium for further crosslinking to occur, but the reduction of modulus of the films when conditioned under wet humidity contradicts this idea. Mooney-Rivilin plots of prevulcanised and post-vulcanised latex films prepared from a similar latex mix further confirm that most of the crosslinking occurs during the latex stage. It is concluded from the chemical probe study that the crosslinks in sulphur-vulcanised dipped NR latex films are predominantly polysulphidics.
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