%0 Journal Article
%T Thermoreversible cross
%A Kanoktip Boonkerd
%A Kumarjyoti Roy
%A Nuttida Srirachya
%A Takaomi Kobayashi
%J Journal of Elastomers & Plastics
%@ 1530-8006
%D 2019
%R 10.1177/0095244318790616
%X In this article, thermoreversible covalent cross-linking of maleated natural rubber (MNR) with glycerol was studied. Firstly, NR was grafted with maleic anhydride using a reactive processing method. The result showed that MNR was successfully obtained without the addition of initiator. The highest grafting was 1.76%. Secondly, the obtained MNR was dissolved in toluene and then mixed with glycerol, which is used in this study as the thermoreversible cross-linking agent. Fourier transform infrared spectra of the casted MNR film mixed with glycerol showed that upon heating, covalent ester cross-links were formed via the reaction of succinic anhydride ring with hydroxyl groups of glycerol. The swelling test indicated that the swelling index (%) decreased with increasing glycerol loading. This indicated that the degree of cross-linking directly depended on the amount of glycerol. The tensile strength and modulus were significantly improved upon increasing the level of cross-linking. The MNR cross-linked with glycerol can be remolded at 150ˇăC more than three times. After remolding, the mechanical properties decreased with increasing recycling round
%K Thermoreversible
%K rubber cross-linking
%K maleated natural rubber
%K glycerol
%U https://journals.sagepub.com/doi/full/10.1177/0095244318790616