NR latex vulcanisation - prevulcanisation and post-vulcanisation of dipped NR latex films.

Amir Hashim M. Y., . and Morris M. D., . NR latex vulcanisation - prevulcanisation and post-vulcanisation of dipped NR latex films. pp. 78-87. ISSN 1511-1768

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-Rivlin 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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Abstract

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-Rivlin 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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Item Type:	Article
AGROVOC Term:	Natural rubber
AGROVOC Term:	Latex
AGROVOC Term:	Physical properties
AGROVOC Term:	Vulcanization
AGROVOC Term:	Leaching
AGROVOC Term:	Humidity
AGROVOC Term:	Distilled water
AGROVOC Term:	Stirring
AGROVOC Term:	Ammonia
AGROVOC Term:	Chemicals
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23293

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