Preparation and Physical Properties of Porous Starch/Natural Rubber Composites

Abstract

Porous starch is modified by the addition of dodecenyl succinate anhydride (DDSA), to decrease the self-aggregation, and then blended with natural rubber (NR) latex to obtain the modified starch/NR composites. The composites are found to have improved properties compared with the corresponding pure NR. Results of a thermal analysis show that the thermal degradation reaction of modified starch/NR composites is a two-step reaction, with the initial (T 0 ) and the final (T f ) temperatures of main reaction being increased, and glass transition temperature (T g ) slightly reduced compared with the corresponding pure NR. The curves of elastic modulus (G 0 ) and loss factor (tanδ) versus the strain of unvulcanized rubber compounds are obtained using a rubber process analyzer. Dynamic mechanical thermal analysis shows that the rolling resistance of the composites is improved by the addition of modified starch.

Eco-friendly biocomposite foam from natural rubber latex and rice starch for sustainable packaging applications

“…Because it is abundant, inexpensive, biodegradable, and has good film-forming properties, several studies have been published on the use of starch as a biodegradable packaging material or as a bio-coating to increase the shelf life of fresh fruit, either alone or in combination with other biopolymers [9]. For NR composites, biodegradability has been pursued by incorporating various kinds of starches, such as corn starch [10][11][12], waxy corn starch [13,14], cassava starch [15][16][17][18][19][20], potato starch [4,21,22], sago starch [23], rice starch [24,25], and unspecified starch [26,27]. Such prior studies, however, have often constructed rubber films or adhesives.…”