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Vulcanisation shows how much the maturity process and can also be determined by the optimal time required for product. The longer of drying times can produce NRL films with the highest quality that can be commercialised to public. The purpose of this research was to determine the best time of drying time in producing NRL films filled with NCC from corn cobs using nano-sized filler prepared by strong acid hydrolysis, which had been dispersed in NRL compound. PVP is then employed as binder characterised by water binding properties and high biocompatibility. The production of NRL film begins with pre-vulcanization process that heated at 70 C, and followed by vulcanization process at 110 C for 10 and 20 minutes. The mechanical and morphological properties of NRL films had been analysed. The results showed that longer time with the addition of PVP had better NRL film. Keywords— natural rubber latex, nanocrystal cellulose, drying time, mechanical properties, morphological properties.

The Effect of Drying Time on Mechanical Properties of Natural Rubber Latex (NRL) Film Filled with Nanocrystal Cellulose (NCC) from Corn Cobs Waste Using Dispersion Agent Polyvinylpyrrolidone (PVP)