Study on the environmental performance of additional vinyl LSR

Liu, Ying; Xia, Zhidong; Lei, Yongping; Zhou, Hongfu

doi:10.1109/isapm.2011.6105735

Cited by 2 publications

(1 citation statement)

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“…Liquid silicone rubber (LSR), another kind of widely used outdoor silicone rubber materials, is synthesized by a hydrosilylation reaction with a platinum catalyst at certain temperatures . For LSR, previous studies are mainly focused on improving its tracking and erosion performance or the influence of environmental parameters, such as temperature and humidity . However, studies on the influence of UV‐A radiation on LSR are scarce, and the underlying mechanism is still unclear.…”

Section: Introductionmentioning

confidence: 99%

Effect of ultraviolet‐A radiation on surface structure, thermal, and mechanical and electrical properties of liquid silicone rubber

Lin

Yin

Wang

et al. 2019

J of Applied Polymer Sci

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Liquid silicone rubber (LSR) products outdoors are often subjected to high intensity of ultraviolet (UV)-A radiation. However, the influence of UV-A radiation on LSR is rarely studied. To study the influence of UV-A radiation on LSR, the surface of LSR with UV-A aging time was characterized by tests at different detection depths [X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS), and Fourier transform infrared spectroscopy (FTIR)]. The operation properties (thermal stability and mechanical and electrical properties) for outdoor insulators were also analyzed. It was found that the porous surface and the loose layer of LSR increased, but the growth rate of them decreased as UV-A aging time increased. SiO 2 fillers were lost in the surface. C H bonds in CH 3 and CH 3 in Si CH 3 increased with aging time. The increased crosslinking density increased the thermal stability, hardness, dielectric loss tangent, relative dielectric constant, and volume resistivity and decreased elongation-at-break. The mechanical strength initially increased and then decreased. Based on the proposed aging mechanism, the UV-A resistance of LSR can be improved by reducing the amount of hydrogencontaining silicone oil and by increasing the molecular weight of raw rubber.

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Section: Introductionmentioning

confidence: 99%