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This study focuses on the synthesis and application of didecanoate of bis(3‐hydroxypropyl) terephthalamide (DD‐BHPTA) as a secondary plasticizer in poly(vinyl chloride) (PVC) compounding. DD‐BHPTA was synthesized from poly(ethylene terephthalate) bottle waste through aminolysis followed by condensation reaction with decanoic acid. Synthesized DD‐BHPTA was characterized by Fourier‐transform infrared spectroscopy, differential scanning calorimetry, and nuclear magnetic resonance. Plasticized PVC was prepared by compounding PVC in different ratios with DD‐BHPTA and dioctyl phthalate (DOP) using a two‐roll mill. This newly synthesized plasticizer completely fused with PVC. The mechanical, thermal, and rheological properties like glass transition temperature, tensile strength, % elongation, dynamic mechanical analysis, solvent resistance, accelerated ultraviolet weathering test for color stability, differential scanning calorimetry, and thermal gravimetric analysis of plasticized PVC were investigated. DD‐BHPTA along with DOP plasticizer demonstrated plasticization efficiency similar to that of DOP alone, with the same plasticizer loading. DD‐BHPTA was found to be the more efficient plasticizer when used in combination with DOP. Thus, DD‐BHPTA can be used as a secondary plasticizer for DOP and can substitute DOP up to 50% of plasticizer loading. J. VINYL ADDIT. TECHNOL., 23:152–160, 2017. © 2015 Society of Plastics Engineers

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In this study, the effect of (methacryloxymethyl)methyldimethoxysilane (MM‐MDMS) concentration on the mechanical, thermal, thermomechanical, rheological, morphological, gel content, cross‐linking density, and compression set properties of dynamically vulcanized ethylene propylene diene monomer (EPDM)/polypropylene (PP) (60/40, w/w) based thermoplastic vulcanizates (TPVs) was carried out. MM‐MDMS induces the physical cross‐linking and grafting as well as enhances chemical cross‐linking between PP and EPDM. This results increment in the values of cross‐linking density, gel content, tensile strength, Young's modulus, elongation at break, and viscosity. In contrast, the values of compression set, melting temperature, enthalpy of melting, crystallinity, and damping factor were observed to decrease with increased addition of MM‐MDMS in the EPDM/PP based TPV. This has been supported by Fourier transform infrared spectroscopy spectra and thermomechanical analysis. Scanning electron microscopy analysis confirmed the increase in compatibility between EPDM and PP on addition of MM‐MDMS. J. VINYL ADDIT. TECHNOL., 24:304–313, 2018. © 2017 Society of Plastics Engineers

The present investigation deals with understanding the influence of vinyltrimethoxysilane (VTMS) concentration on the mechanical, thermal, thermomechanical, rheological, morphological, gel content, crosslinking density, and compression set properties of dynamically vulcanized ethylene propylene diene monomer (EPDM)/ polypropylene (PP) (60/40, w/w) -based thermoplastic vulcanizates. It was determined that the values of crosslinking density, gel content, tensile strength, Young's modulus, elongation at break, and viscosity increased; whereas that of compression set, melting temperature, enthalpy of melting, crystallinity, and damping factor decreased with increased addition of VTMS in the EPDM/PP-based thermoplastic vulcanizate. This is attributed to the physical crosslinking caused because of VTMS grafting on EPDM and chemical crosslinking induced by VTMS between PP and EPDM. This has been confirmed by Fourier-transform infrared spectroscopy spectra, whereas the thermomechanical and scanning electron microscopy analysis confirmed increased compatibility between EPDM and PP on the addition of VTMS. J. VINYL ADDIT. TECHNOL., 00:000-000, 2015.