Preparation of Natural Rubber/Cloisite-Na+ nanocomposite in Latex Stage and its Characterization for Mould Application

By : Nurul Hayati Yusof, Dazylah Darji, Tan Kim Song, Nghiem Thi Thuong

Page No: 151-166

Abstract
In this work, a pure gum mould made of prevulcanized natural rubber/cloisite-Na+ nanocomposite (PVNR/CN) was prepared and characterized for ornament application. The suitable conditions to prepare PVNR/CN latex mixtures and the properties of the resulting PVNR/CN nanocomposites were investigated. The optimum CN concentration in the latex mixture was 1.0 phr, with the properties of 60 wt% total solid content, more than 600 sec mechanical stability time, lower than 350 cP Brookfield viscosity, and pH 10. The properties of PVNR/CN nanocomposite showed high strength, moderate hardness, and good thermal stability. The morphology by TEM showed well dispersion of CN particles in between the rubber dispersoid. The PVNR/CN nanocomposite as a mould was evaluated by shrinkage measurement. The presence of 1.0 phr CN in the PVNR/CN nanocomposite achieved the least shrinkage. The reproduced object using the PVNR/CN nanocomposite as a mould showed complete fine details similar to the original object via visual observation.

Authors :
Nurul Hayati Yusof
Malaysian Rubber Board, Engineering and Technology Division, 47000, Sungai Buloh, Selangor, Malaysia.

Dazylah Darji
Malaysian Rubber Board, Engineering and Technology Division, 47000, Sungai Buloh, Selangor, Malaysia.

Tan Kim Song
Malaysian Rubber Board, Engineering and Technology Division, 47000, Sungai Buloh, Selangor, Malaysia.

Nghiem Thi Thuong
School of Chemical Engineering, Hanoi University of Science and Technology, No 1 Dai co Viet, Hanoi, Vietnam.
 

DOI: https://doi.org/10.32381/JPM.2022.39.1-2.10