Reversible addition-fragmentation chain transfer polymerization of chloroprene on the surface of silica nanoparticles was performed to obtain polychloroprene-grafted-silica nanoparticles (PCP-g-SiO 2 NPs). These particles were dispersed in a commercial polychloroprene matrix to obtain PCP nanocomposites with different silica core loadings (1, 5, 10, and 25 wt%). Two different chain graft densities were studied (“low,” 0.022 ch/nm 2 and “high,” 0.21 ch/nm 2 ) as a function of the grafted polymer molecular mass. The cured samples showed significant improvement in the mechanical properties of the PCP rubber nanocomposites as compared to the unfilled PCP as measured by standard tensile and dynamic mechanical analysis even with low silica content. The mechanical properties of the nanocomposites were notably enhanced when the graft density was low and grafted molecular masses were high. Transmission electron microscopy (TEM) and Small-Angle X-ray Scattering (SAXS) were used to analyze the dispersion states of the grafted nanoparticles which confirmed the correlation between high grafted chain lengths and improved dispersion states and mechanical properties

Abbas, Z., Tawfilas, M., Khani, M., Golian, K., Marsh, Z., Jhalaria, M., et al. (2019). Reinforcement of polychloroprene by grafted silica nanoparticles. POLYMER, 171, 96-105 [10.1016/j.polymer.2019.03.031].

Reinforcement of polychloroprene by grafted silica nanoparticles

Tawfilas, Massimo;Simonutti, Roberto;
2019

Abstract

Reversible addition-fragmentation chain transfer polymerization of chloroprene on the surface of silica nanoparticles was performed to obtain polychloroprene-grafted-silica nanoparticles (PCP-g-SiO 2 NPs). These particles were dispersed in a commercial polychloroprene matrix to obtain PCP nanocomposites with different silica core loadings (1, 5, 10, and 25 wt%). Two different chain graft densities were studied (“low,” 0.022 ch/nm 2 and “high,” 0.21 ch/nm 2 ) as a function of the grafted polymer molecular mass. The cured samples showed significant improvement in the mechanical properties of the PCP rubber nanocomposites as compared to the unfilled PCP as measured by standard tensile and dynamic mechanical analysis even with low silica content. The mechanical properties of the nanocomposites were notably enhanced when the graft density was low and grafted molecular masses were high. Transmission electron microscopy (TEM) and Small-Angle X-ray Scattering (SAXS) were used to analyze the dispersion states of the grafted nanoparticles which confirmed the correlation between high grafted chain lengths and improved dispersion states and mechanical properties
Articolo in rivista - Articolo scientifico
Nanocomposites; Polychloroprene; RAFT polymerization; Surface modification; Organic Chemistry; Polymers and Plastics; Materials Chemistry2506 Metals and Alloys;
English
8-mag-2019
2019
171
96
105
reserved
Abbas, Z., Tawfilas, M., Khani, M., Golian, K., Marsh, Z., Jhalaria, M., et al. (2019). Reinforcement of polychloroprene by grafted silica nanoparticles. POLYMER, 171, 96-105 [10.1016/j.polymer.2019.03.031].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/226265
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