PMMA blended and DPNR-g-PMMA coated DPNR and NR-LA for dipping applications



Deproteinized natural rubber (DPNR) latex, prepared by digesting the protein within low-ammonia preserved concentrated (NR-LA) latex with alcalase enzyme at 40°C for 24 h, has the nitrogen content of 0.039 wt %. Poly(methyl methacrylate) (PMMA) and graft copolymers (DPNR-g-PMMA) latices were synthesized by emulsion polymerization technique for blending or coating on DPNR or NR-LA. Their general properties of natural and synthesized latices including compounded latex were verified. The friction coefficient of a homogenous film obtained from PMMA blended DPNR or NR-LA latex and a DPNR-g-PMMA coated DPNR and NR-LA film was found to be lower than those of films prepared by using DPNR or NR-LA latex. Furthermore, the DPNR-g-PMMA coated films had lower friction coefficient than those of PMMA blended films. The physical properties in terms of 300% modulus, tensile strength, and elongation at break of those rubbers were tested and confined to the ASTM 3377-78a and ASTM 3378-99 standards for dipping products of surgical gloves and examination gloves, respectively. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 833–844, 2004