Title: PREPARATION AND PROPERTIES OF A WATER-SWELLING RUBBER BY IN SITU FORMED LITHIUM ACRYLATE IN NITRILE RUBBER
Page Range: p.181-190
Author(s): Wentan Ren; Zonglin Peng; Yong Zhang; Yinxi Zhang
File size: 188K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 13
Issue No: No. 2
Abstract
Lithium acrylate (LiAA) was in situ prepared in nitrile rubber (NBR) through neutralisation of lithium hydroxide (LiOH) and acrylic acid (AA) during mixing. The NBR/LiAA compounds were vulcanised with dicumyl peroxide (DCP). The in-situ preparation and polymerisation of LiAA were characterised using FTIR spectrometry. The micrographs of the compounds and vulcanisates were explored using SEM. The effects of DCP and LiAA contents on the water-swelling and mechanical properties of the vulcanisates were studied, and the relationship between the LiOH/AA molar ratio and the properties of the vulcanisates was investigated. Results showed that the in situ formed LiAA could improve the mechanical and water-swelling properties of the NBR/LiAA vulcanisates. Properly compounded vulcanisates were found to have high water-swelling ratios over 800%, and tensile strength of ore than 12MPa. DSC measurements indicated that he water absorbed in the vulcanisate existed in PLiAA and NBR networks in three different physical states, namely: free water, freezable bound water and non-freezable bound water. 36 refs.
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