Theoretical Explanation of Vulcanisation of Latex of Landolphia Owariensis (P. Beauv) Using Sodium Sulphite (Na₂SO₃) Solution Under Low Temperature

摘要

This paper offers a theoretical explanation of vulcanisation of latex of Landolphia Owariensis (P.Beauv) using sodium sulphite (Na₂SO₃) solution under low temperature. The author proposes reaction routes in vulcanising the latex and suggests a structure for vulcanised rubber. The study set out to answer the question: what happens in chemical reactions involving natural rubber of which the latex of Landolphia Owariensis (P. Beauv) is composed, and what is the reaction mechanism during its vulcanisation? Latex of Landolphia Owariensis (P. Beauv) is one of the local plant materials identified in Nigeria for teaching some Organic Chemistry concepts in secondary schools. The latex has been used in a laboratory-based experiment to teach secondary schools students the concept of vulcanisation of rubber, but not with the conventional method of vulcanisation.