Water-soluble Substance: Characteristics and Effects on the Properties of Natural Rubber Latex

摘要

Water-soluble substance is an important part of non-rubber substance in natural rubber latex and it has significant influence on the properties of natural rubber. The aim of this paper is mainly to study the composition of small-molecular-weight water-soluble substance (s-WSS) and its effects on the properties of natural rubber films. The analysis of IR and HPLC-MS showed that s-WSS (not including sugar) is composed of C_3H_4N_4O_6, C_7H_(14)O_6, C_(11)H_(13)N_3O_5, C_(11)H_(20)O_7 and C_6H_(22)N_8. While the main component of s-WSS is C_7H_(14)O_6 which is a kind of alcohol. The tensile strength of the prepared composites can be increased at low loading of s-WSS. The tear strength of the prepared composites can be improved by adding s-WSS into natural rubber. The thermal oxidation degradation process of the samples has two stages. Compared with neat natural rubber latex, the initial degradation temperature was decreased significantly in both stages when s-WSS was added. While the degradation temperature range became larger in both stages.