Rubber thread made from a mixture of RVNRL and NR-g-PMMA

Natural rubber grafted with methyl methacrylate (NR-g-PMMA) latex has been mixed with radiation vulcanized natural rubber latex (RVNRL) (1:1 by weight) to be the material for rubber thread. The NRG-PMMA is produced by radiation of methyl methacrylate (MMA) onto natural rubber latex with various concentration of monomer 50, 75, and I 00 phr (part per hundred ratio of rubber) at the irradiation dose of 5 kGy. The physical and mechanical properties of latex, film and thread from the mixed latex are evaluated. The results show that by increasing the concentration of NR-G-PMMA in RVNRL the modulus of thread increases, while for obtaining the modulus of thread meets to the ISO standard, the RVNRL should be mixed with 100 phr of NR-g-PMMA latex