was 30, 45, and 60 mm in different experiments. All experiments were conducted in a dark room at 28 °C. After the
UV irradiation, PVNRL was diluted to 45% (w/w) dry rubber content with an aqueous solution of ammonia (0.6% w/w
ammonia). A 1 mm thick film of PVNR was produced by pouring the PVNRL suspension on a glass plate and drying to a
constant weight in air at room temperature. Around 36 g of PVNRL suspension was required on a glass plate of dimensions
13 cm × 13 cm to form the final 1 mm thick film. The dry PVNR film could be peeled from the glass surface.