Preparation of rubber foam by blending natural rubber latex with graft copolymer of natural rubber and methyl methacrylate (NR-g-MMA)

Preparation of rubber foam by blending natural rubber latex with graft copolymer of natural rubber and methyl methacrylate (NR-g-MMA)
การเตรียมฟองน้ำจากการตีผสมน้ำยางธรรมชาติกับกราฟต์โคพอลิเมอร์ของยางธรรมชาติกับเมธิลเมทาคริเลท

Charoen Nakason, Asst. Prof., D. of Rubber Tech. and Polymer Sci., F. of Sci. and Tech., PSU.
Azizon Kaesaman, D. of Rubber Tech. and Polymer Sci., F. of Sci. and Tech., PSU.
Nikorn Yimwan, B.Sc. Student in Rubber Tech., PSU.
Corresponding e-mail : ncharoen@bunga.pn.psu.ac.th

Grant : Government Budget
Presented : The 1st Thailand Materials Science and Technology,19-20 July 2000, The Amari Watergate Hotel, Bangkok, p. 350-353
Key words : latex foam rubber, graft copolymer, hardness, resilience, compression set

Graft copolymer of natural rubber and methyl methacrylate was prepared using semi-batch emulsion polymerization technique with a redox initiator. The graft copolymer was later used to pre-pare latex foam rubber by blending with an high ammonia concentrate latex. The results showed that hardness, resilience, density and compression set of the latex foam increased with increasing the quantity of graft copolymers used and level of grafted PMMA in the natural rubber molecules.

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