Dynamically vulcanized high impact polystyrene/high vinyl polybutadiene rubber composites compatibilized by styrene–butadiene–styrene block copolymer

Abstract

Thermoplastic vulcanizates (TPVs) based on high impact polystyrene (HIPS)/high vinyl polybutadiene rubber (HVPBR) composites were prepared by dynamic vulcanization, and then compatibilized by styrene–butadiene–styrene (SBS) block copolymer. The effects of SBS compatibilizer on mechanical properties, Mullins effect, morphological and dynamic mechanical properties of the TPVs were investigated systematically. Experimental results indicated that SBS had an excellent compatibilization effect on the dynamically vulcanized HIPS/HVPBR composites. Compared with those of HIPS/HVPBR composite, the tensile strength, elongation at break and tearing strength of HIPS/HVPBR composite with 12 phr SBS incorporation were improved by about 163%, 312% and 67%, respectively. Mullins effect results showed that the compatibilized HIPS/HVPBR TPVs had relatively lower residual deformation and internal friction loss than those of HIPS/HVPBR composites, indicating the improvement of elastic reversibility. Morphology studies showed that the interface interaction of the TPVs was enhanced and the particle sizes of the dispersed phase were decreased with the incorporation of SBS compatibilizer. Dynamic mechanical analysis studies showed that the Tg s of HIPS and HVPBR phases were slightly shifted toward low temperature with the incorporation of SBS, which indicates the significant improvement of the compatibility.

Dynamic ionic behavior of gel-free diolefin rubber-based carboxylate ionomers preparedviaolefin metathesis

“…HVBR is characterized with a high wet-skid resistance, low heat generation and superior anti-aging performance due to the more than 80% of vinyl side group content. 1–3 Moreover, compared with other common types of rubber materials such as natural rubber (NR), styrene butadiene rubber (SBR), butadiene rubber (BR) etc. , HVBR shows a higher loss factor value and a glass transition temperature ( T g ) closer to room temperature, which thus is acknowledged as a promising damping material.…”

Unexpected Improvement of Both Mechanical Strength and Elasticity of EPDM/PP Thermoplastic Vulcanizates by Introducing β-Nucleating Agents

“…The most important properties of TPVs include mechanical, elastic, and rheological properties, which are dependent on their microstructure. It has been widely reported that a fine rubber dispersed phase is required to achieve good mechanical properties and high elasticity of TPVs. ,− Thus, over the several past decades, numerous studies have been performed to improve the mechanical properties and elasticity of TPVs by decreasing the size of the dispersed rubber phase in the continuous plastic phase. ,− In addition, to provide guidance for the production of high-performance TPVs, the effect of the composition ratio of the rubber phase and plastic phase, the cross-linking density of the rubber phase, the introduction of plasticizers and fillers in TPVs, and processing conditions on the mechanical properties and elasticity of TPVs have been widely studied . As far as we know, the effect of crystal morphology of the plastic phase on the properties, especially elasticity of TPVs, has been rarely reported.…”

Dynamically vulcanized high-density polyethylene/nitrile butadiene rubber blends compatibilized by chlorinated polyethylene

“…However, the most economical and environmental friendly method to improve the interfacial compatibility is the incorporation of compatibilizer, which can effectively enhance the interfacial interaction. 13 –15 George et al 16 used maleic-modified polyethylene (MA-PE) and phenolic-modified polyethylene (PH-PE) to improve the mechanical properties of HDPE/NBR blends, then evaluated the effects of dynamic cross-linking on the properties of HDPE/NBR blends 17 ; and the influences of MA-PE on the properties of dynamically vulcanized HDPE/NBR blend were also reported by George. 18 However, we know of no reports on the compatibilization of dynamically vulcanized HDPE/NBR blends by chlorinated polyethylene (CPE).…”