Morphology and mechanical properties of styrene-butadiene-styrene/polystyrene semi-interpenetrating polymer networks and their blends

In this study, nanocomposite foams based on styrene-butadiene-styrene (SBS) copolymer and nanosized calcium carbonate (CaCO3) were prepared using chemical blowing agent (modified Azodicarbonamide) by compression molding at (230°C) temperature and (30MPa) pressure. The effect of nano CaCO3 concentration on cell nucleation rate, foam density, morphology and mechanical properties were studied for all samples. It was found that foam morphology and strength affected by nanofiller addition and its concentration. The results showed that SBS nanocomposite foam with 5 phr of CaCO3 nanoparticles have more cell density and smaller size cells compared with another samples. mechanical properties in compressive mode for foams were improved by increasing nano calcium carbonate content.

Download Full-text

Preparation of IPNs SBS/PBMA-b-PMA and Effect of Compatibility with PVC

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.320.97 ◽

2011 ◽

Vol 320 ◽

pp. 97-102

Author(s):

Zhi Chao Wang ◽

Huan Liu ◽

Hua Hou ◽

Zhen Xing Yang ◽

Zhong Wei

Keyword(s):

Polymer Networks ◽

Interpenetrating Polymer Networks ◽

Butyl Methacrylate ◽

H Nmr ◽

Ft Ir ◽

Styrene Butadiene Styrene ◽

Core Shell Structure ◽

Surface Morphologies ◽

Styrene Butadiene ◽

Butadiene Styrene

Interpenetrating polymer networks (IPNs) Poly(styrene-butadiene-styrene)/Poly(n-butyl methacrylate-b-methyl acrylate) (SBS/PBMA-b-PMA) was prepared by atom transfer radical polymerization (ATRP) and characterized by FT-IR, 1H NMR and TEM. The TEM photos illustrated that SBS/PBMA-b-PMA formed an obvious core-shell structure, with cross-linked SBS/PBMA core and linear PMA shell. The compatibility of IPNs with PVC was studied using SEM and DSC instruments. The mixed polymers displayed one Tg (Tg=79.4°C, ΔTg=32.5°C) and showed good compatibility. The SEM fracture surface morphologies displayed partial feature of ductile fracture different form neat PVC.

Download Full-text

Morphology and mechanical properties of polypropylene/maleated styrene-butadiene-styrene triblock copolymer blends

Journal of Applied Polymer Science ◽

10.1002/app.10971 ◽

2002 ◽

Vol 86 (2) ◽

pp. 359-365 ◽

Cited By ~ 11

Author(s):

Helena Maria Wilhelm ◽

Maria Isabel Felisberti

Keyword(s):

Mechanical Properties ◽

Triblock Copolymer ◽

Copolymer Blends ◽

Styrene Butadiene Styrene ◽

Styrene Butadiene ◽

Morphology And Mechanical Properties ◽

Butadiene Styrene

Download Full-text

Flammability and mechanical properties of poly(styrene–butadiene–styrene) copolymer–containing intumescent flame retardants

Journal of Thermoplastic Composite Materials ◽

10.1177/0892705715614061 ◽

2015 ◽

Vol 30 (6) ◽

pp. 816-826 ◽

Cited By ~ 7

Author(s):

Yiren Huang ◽

Jianwei Yang ◽

Zhengzhou Wang

Keyword(s):

Mechanical Properties ◽

Flame Retardant ◽

Flame Retardants ◽

Oxygen Index ◽

Limiting Oxygen Index ◽

Styrene Butadiene Styrene ◽

Flame Retardant Properties ◽

Intumescent Flame Retardants ◽

Styrene Butadiene ◽

Butadiene Styrene

Flame-retardant properties of ammonium polyphosphate (APP) and its two microcapsules, APP with a shell of melamine–formaldehyde (MF) resin (MFAPP) and APP with a shell of epoxy resin (EPAPP), were studied in styrene–butadiene–styrene (SBS). The results indicate that APP after the microencapsulation leads to an increase in limiting oxygen index in SBS compared with APP. When dipentaerythritol is incorporated into the SBS composites containing the APP microcapsules, a further improvement in flame retardancy of the composites is observed. The microencapsulation does not result in much improvement of mechanical properties. Moreover, the effect of a compatibilizer (SBS grafted with maleic anhydride) on flame-retardant and mechanical properties of SBS/APP composites was investigated.

Download Full-text