Polyhedral oligomeric silsesquioxane/silica/polydimethylsiloxane rubber composites with enhanced mechanical and thermal properties

2015 ◽  
Vol 132 (26) ◽  
pp. n/a-n/a ◽  
Author(s):  
Dian Zhang ◽  
Guangsu Huang ◽  
Yunhui Shi ◽  
Guangya Zhang ◽  
Yufeng Liu
Keyword(s):  
Thermal Properties ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Mechanical And Thermal Properties ◽  
Rubber Composites ◽  
Oligomeric Silsesquioxane

Crosslink Effects of Octavinyl Polyhedral Oligomeric Silsesquioxane on the Mechanical and Thermal Properties of Polyacrylate Nanocomposites

2012 ◽  
Vol 476-478 ◽  
pp. 402-405
Author(s):  
Chang Su ◽  
Cun Bin Zhao ◽  
Pan He ◽  
Cheng Zhang
Keyword(s):  
Fourier Transform ◽  
Thermal Properties ◽  
Infrared Spectrum ◽  
Butyl Acrylate ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Crosslinking Density ◽  
Mechanical Analysis ◽  
Mechanical And Thermal Properties ◽  
Dynamic Mechanical ◽  
Oligomeric Silsesquioxane

Poly(butyl acrylate-co-methyl methacrylate-co-octavinyl polyhedral oligomeric silsesquioxane) (OVPOSS-P(BA-MMA)) nanocomposites were synthesized by emulsion polymerization. The structures of nanocomposites were characterized by Fourier transform infrared spectrum (FTIR) and solubility experiment. It was shown that the network structures have been formed during the copolymerization. Dynamic mechanical analysis (DMA) was used to investigate the dynamic mechanical and thermal properties. The data indicate that the crosslinking density apparently affects the mechanical and thermal properties of OVPOSS-P(BA-MMA).

Clay modification with silane compounds and characterization of the silicone rubber/clay composites

2012 ◽  
Vol 32 (8-9) ◽  
pp. 493-502 ◽  
Author(s):  
Kyeong Hoon Jang ◽  
Eung-Soo Kim ◽  
Young Ho Jeon ◽  
Jin-San Yoon
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Silicone Rubber ◽  
Cross Linking ◽  
Mechanical And Thermal Properties ◽  
Curing Agent ◽  
Thiol Groups ◽  
Rubber Composites ◽  
Clay Modification

Abstract Na+ montmorillonite (MMT) was modified with benzyldimethyltetradecylammonium chloride (B13) and further with (3-mercaptopropyl)triethoxysilane and vinyltrimethoxysilane to prepare B13-MMT, mercaptomethylorthosilicate modified MMT (MTMO), and vinyltrimethoxysilane modified MMT (VTMO), respectively. The pristine and modified clays were compounded with an HTV-type silicone rubber (GP-30®), and the physical properties and morphology of the resulting rubber composites were examined. Both HTV/MTMO and HTV/VTMO exhibited an intercalated/exfoliated coexisting morphology, but the degree of exfoliation of the former composite was higher than that of the latter. Moreover, the thermal stability, as assessed by the onset temperature of thermal degradation, as well as the tensile stress, elongation at the break, and tear strength of HTV/MTMO was higher than those of HTV/B13-MMT and HTV/VTMO. However, the cross-linking density of HTV/MTMO was the lowest among the composites examined because the thiol groups of MTMO extinguished and abstracted the radicals formed by the curing agent. Accordingly, the improved mechanical and thermal properties of HTV/MTMO were attributed to the enhanced interactions between HTV and MTMO due to the chemical reaction between the thiol groups of MTMO and the vinyl groups of HTV.

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