Synthesis of silane‐grafted ethylene vinyl acetate copolymer and its application to compatibilize the blend of ethylene‐propylene‐diene copolymer and silicone rubber

Abstract

Vinyltrimethoxysilane-grafted ethylene vinyl acetate copolymer (EVA-g-VTMS) was synthesized and applied to compatibilize ethylene-propylene-diene copolymer (EPDM)/methyl vinyl silicone rubber (MVQ) blends. The silane-grafting was successfully proved by differential scanning calorimetry, FTIR spectroscopy and XPS spectroscopy. The additive amount of the compatibilizer (EVAg-VTMS) was optimized to be 10 phr (parts per hundred of rubber in weight) based on analysis of scanning electron microscopy, mechanical properties, aging properties, dynamic mechanical properties, rheological properties and thermal properties. Compared with the blend without EVA-g-VTMS, results show that the blend with 10 phr of EVA-g-VTMS exhibits the finest morphology. Tensile strength, elongation at break, modulus at 100% elongation, tear strength and TE index increase by 82.5%, 16.9%, 60.0%, 40.9%, and 41.9%, respectively. Dynamic mechanical analysis reveals storage modulus increase and glass transition temperatures of EPDM and MVQ move closer to each other. Rheological analysis shows a decrease in complex modulus and complex viscosity, and

Mechanical properties, thermal stability, and thermal degradation kinetics of silicone rubber/ethylene‐vinyl acetate copolymer/magnesium sulfate whisker composites compatibilized by ethylene‐acrylic acid copolymer

“…The interaction of fillers and rubber inhibits the movement of the polymer chains, resulting in a decrease in tan δ max or an increase in T g 29 . Similar findings have been reported by other groups 11,30,31 …”

Enhancing Asphaltene Spinnability via Polymer Blending

“…The FTIR spectrum of EVA (Figure C) revealed a prominent peak at 1736 cm –1 that is related to CO and at 1241 and 1020 cm –1 , which are related to antisymmetric and symmetric stretching vibrations of C–O in C–O–C. , Absorption peaks at 1369, 1457, 2852, and 2918 cm –1 are assigned to –CH 3 symmetric bending vibration, –CH 2 rocking vibration, aliphatic –CH 2 symmetric, and asymmetric stretching vibrations, respectively. , In addition, a methylene peak at 721 cm –1 was also observed. Similar to the other AS–polymer blends, no new peaks were observed in the AS–EVA blends.…”

“…33,34 Absorption peaks at 1369, 1457, 2852, and 2918 cm −1 are assigned to −CH 3 symmetric bending vibration, −CH 2 rocking vibration, aliphatic −CH 2 symmetric, and asymmetric stretching vibrations, respectively. 33,34 In addition, a methylene peak at 721 cm −1 was also observed. Similar to the other AS− polymer blends, no new peaks were observed in the AS−EVA blends.…”

Study on synthesis and mechanical properties of Eu3+‐π/covalent hybrid crosslinked silicone rubber

“…[ 5 ] Understanding the mechanical behavior of silicone rubber is of great significance to guide its application. The mechanical behavior of silicone rubber has now been studied in depth in terms of inorganic nanofiller filling, [ 6,7 ] rubber‐plastic blending, [ 8,9 ] molecular chain structure design [ 10,11 ] and cross‐linked network structure design, [ 12,13 ] and a series of mechanical models of rubber materials have been established. [ 14–16 ] The current nonlinear mechanical behavior of silicone rubber is mainly caused by the deconvolution, slip, and shedding of molecular chains, which is closely related to temperature and time.…”

“…[5] Understanding the mechanical behavior of silicone rubber is of great significance to guide its application. The mechanical behavior of silicone rubber has now been studied in depth in terms of inorganic nanofiller filling, [6,7] rubberplastic blending, [8,9] molecular chain structure design [10,11] and cross-linked network structure design, [12,13] and a series Xuejun Yue and Shangjun Zeng are co-first authors of the article.…”