Abstract

It includes the study of most versatile kind of rubber namely, Styrene-Butadiene rubber (SBR) for which the M-polynomials and various topological indices are determined and depicted using graphs. The repeat units of styrene and butadiene are classified as three different entities viz., $A:{[C{H}_2-CH(C_6{H}_5)]}_n;$ $B:{[C{H}_2-CH(CH=C{H}_2)]}_n$ and $C:{[C{H}_2-CH=CH-C{H}_2]}_n$ for which the polymers are considered. The same chains of A, B and C can be restricted to dimers and trimers with different combinations of these entities A, B and C like AA, AB, BC, BB, CC, ABA, ABB and so on. In this study, the polymers of A, B and C are considered.

摘要

它包括对最通用的橡胶种类的研究，即苯乙烯-丁二烯橡胶（SBR），针对该橡胶确定了M多项式和各种拓扑指数，并使用图表进行了描绘。苯乙烯和丁二烯的重复单元分为三种不同的实体，即$\mathrm{一种}：{[C{H}_2-CH（C_6{H}_5）]}_{ñ};$ $乙：{[C{H}_2-CH（CH=C{H}_2）]}_{ñ}$ 和 $C：{[C{H}_2-CH=CH-C{H}_2]}_{ñ}$为此考虑聚合物。A，B和C的相同链可以限于具有这些实体A，B和C的不同组合的二聚体和三聚体，例如AA，AB，BC，BB，CC，ABA，ABB等。在这项研究中，考虑了A，B和C的聚合物。