Studies on the Influenced of Dextrin Filler on the Mechanical Properties of Carboxylated Nitrile Butadiene Rubber (Xnbr) Films

摘要

Dextrin used in this experiment is a product of acidified sago starch being heated at high temperature. The use of dextrin as filler in latex films is to produce environmental friendly products. The synthesized dextrin dispersion was prepared by mechanical (ball milling). Dextrin (DX) is compounded with carboxylated nitrile butadiene rubber (XNBR) latex. The DX/XNBR films were prepared by incorporating dextrin at filler loading of 0, 5, 10, 15 and 20 phr into XNBR latex. The dextrin was then mixed with XNBR compound as a filler and a film was prepared by coagulant dipping technique The effect of dextrin loadings on tensile properties of XNBR films were investigated. The results indicated that the tensile properties such as tensile strength, elongation at break, and crosslink density decreased with increasing filler loading. The changes of functional groups present in native sago, dextrin and DX/XNBR film were characterized using Fourier Transform Infra-Red (FTIR). The morphological properties of tensile fractured surfaces of the samples were observed using Scanning Electron Microscope (SEM).