Rheological study of EPDM /silicone rubber blends phase inversion and characterization of resultant mechanical and thermal properties

2020 ◽  
Vol 138 (14) ◽  
Author(s):  
Rafael Barbosa ◽  
Guilherme Eduardo de Oliveira Blanco ◽  
Alexander Hiroshi Kasama ◽  
Diego Alexandre Belmonte Barbosa ◽  
Rafael de Almeida Peçanha ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Silicone Rubber ◽  
Phase Inversion ◽  
Mechanical And Thermal Properties ◽  
Rheological Study ◽  
Rubber Blends

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.

Mechanical and thermal characterization of grafted PP-NCC nanocomposites

2019 ◽  
pp. 089270571987822
Author(s):  
Saud Aldajah ◽  
Mohammad Y Al-Haik ◽  
Waseem Siddique ◽  
Mohammad M Kabir ◽  
Yousef Haik
Keyword(s):  
Thermal Properties ◽  
Interfacial Adhesion ◽  
Thermal Characterization ◽  
Mechanical And Thermal Properties ◽  
Screw Extruder ◽  
Scanning Calorimetry ◽  
Three Point Bending ◽  
Twin Screw ◽  
Thermal Stability Of

This study reveals the enhancement of mechanical and thermal properties of maleic anhydride-grafted polypropylene (PP- g-MA) with the addition of nanocrystalline cellulose (NCC). A nanocomposite was manufactured by blending various percentages of PP, MA, and NCC nanoparticles by means of a twin-screw extruder. The influence of varying the percentages of NCC on the mechanical and thermal behavior of the nanocomposite was studied by performing three-point bending, nanoindentation, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and Fourier-transform infrared (FTIR) spectroscopy tests. The novelty of this study stems on the NCC nanoparticles and their ability to enhance the mechanical and thermal properties of PP. Three-point bending and nanoindentation tests revealed improvement in the mechanical properties in terms of strength, modulus, and hardness of the PP- g-MA nanocomposites as the addition of NCC increased. SEM showed homogeneity between the mixtures which proved the presence of interfacial adhesion between the PP- g-MA incorporated with NCC nanoparticles that was confirmed by the FTIR results. DSC and TGA measurements showed that the thermal stability of the nanocomposites was not compromised due to the addition of the coupling agent and reinforced nanoparticles.

Characterization of Mechanical and Thermal Properties of Poly(ethylene-co -vinyl acetate) with Differents Bentonites

2014 ◽  
Vol 343 (1) ◽  
pp. 88-95 ◽  
Author(s):  
Reinaldo Yoshio Morita ◽  
Juliana Regina Kloss ◽  
Ronilson Vasconcelos Barbosa
Keyword(s):  
Thermal Properties ◽  
Vinyl Acetate ◽  
Mechanical And Thermal Properties ◽  
Poly Ethylene
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