การปรับปรุงสมบัติน้ำยางธรรมชาติกราฟต์ด้วยพอลิเมทิลเมทาคริเลทวัลคาไนซ์ด้วยกลูตารัลดีไฮด์เป็นสารเชื่มขวางและการประยุกต์ใช้

Abstract

A novel and inexpensive method to vulcanize natural rubber latex (NRL) at low temperature by using glurataraldehyde (GA) was successfully prepared and developed. The main objective of this work is to improve the mechanical and other related properties. The effect of natural rubber modification, blending, and reinforcing by using GA as curing agent on the properties (i.e., mechanical, thermal and oil resistant properties) has been investigated. It was found that the properties of cured grafted NR increased with increasing of functional group contents while blending the poly(vinyl alcohol) (PVA) into NRL gained the advantages in term of processing and the addition of nano-clay can improved the mechanical, thermal and oil resistant properties. Furthermore, it was found that cured grafted NR/PVA blend gave better properties than that of cured unmodified NR/PVA blend due to beneficial of the interaction between both phases. The most suitable condition obtained from this work is blending NR-g-PMMA/PVA of 90/10 wt% together with adding 1 phr of nano-clay. The results showed well agreement with dispersion from supporting characterization (ie., SEM-EDX). The properties of newly developed material exhibited better than the benchmarking properties of the rubber flooring sheets from Thai Industrial Standard (TIS 2377-2551). This obtained knowledge would be an alternative way to applied for various rubber industrial applications