ผลของสารเชื่อมขวางต่อสมบัติของไฮโดรเจลเชื่อมโยงแบบกึ่งโครงร่างตาข่ายของยางธรรมชาติและแป้งมันสำปะหลัง
Main Article Content
Abstract
Effect of Crosslinking agent to Properties of Semi- Interpenetrating Polymer Network Hydrogel of Natural Rubber and Cassava Starch
Chaiwute Vudjung1*, Umapon Chaisuwan2, Uraiwan Pangan2, Nattiya Chaipugdee2, Tipsuda Boonpasuk2, Jiraporn Kwanhean2, Saowaluk Boonyod1 and Onuma Santawitee3
Semi-Interpenetrating polymer network (Semi-IPN) hydrogel of natural rubber and cassava starch (Semi-IPN NR/ST) were prepared by blending the concentrated natural rubber latex and gelatinized cassava starch using potassium persulphate and N, N’-Methylene-Bis-Acrylamide (MBA) as initiator and crosslinking agent, respectively. The influence of content of MBA on the water absorption and heat stability properties of Semi-IPN NR/ST was investigated. The results showed that the water absorption and the heat stability properties of the Semi-IPN NR/ST were a function of amount of MBA. The percentage of the water absorption of Semi-IPN NR/ST decreased with increasing MBA content. The highest percentage of the water absorption of Semi-IPN NR/ST was ca. 90 % at 1.0 phr MBA content, while the heat stability was improved with increasing MBA content due to densely crosslink bond in structure of Semi-IPN NR/ST which caused the difficult heat degradation of Semi-IPN NR/ST hydrogel and lower water absorption of Semi-IPN NR/ST molecule.