Impact of halloysite nanotubes on the curing characteristics, mechanical performance, and swelling resistance of SBR/NBR nanocomposites

In this research, a novel investigation explored the enhancement of nanocomposites by blending styrene-butadiene rubber/acrylonitrile butadiene rubber (SBR/NBR) with both unmodified and [3-(2,3-Epoxypropoxy)-propyl]-trimethoxysilane-modified halloysite nanotubes (pHNTs and mHNTs). The study aimed to improve interfacial interactions and refine the SBR/NBR phase microstructure, leading to superior mechanical properties. Using a two-roll mill, mHNTs were incorporated at varying levels (0–10 phr). Results demonstrated reduced curing times (optimum cure time—t₉₀, scorch time—t_s2), increased maximum torque (M_H), and substantial enhancements in tensile strength (up to 182%) and abrasion resistance (optimized at 6 phr mHNTs). Additionally, swelling resistance improved with higher mHNTs content, highlighting effective dispersion and interactions of HNTs within the SBR/NBR matrix.