A Study on Impact Properties of γ-Ray Irradiated LLDPE Filled with Alumina Trihydrate

Abstract

Abstract: Alumina trihydrate(ATH) can be used as a fire retardant of polyethylene which is incompatible with ATH.Functional groups(mainly carbonyl and hydroxyl groups) are intro-duced to LLDPEmolecular chains by γ-rays in air so as to improve the affinity between LLDPEand ATH.The effect of dose rate on oxidation and degradation of LLDPEexposed to γ-rays in air under the same integrated dose, and the impact properties of LLDPE/γ-LLDPE/ATHblend were studied in this paper.The experimental results show that the lower dose rate favors oxidation and degradation of LLDPE.γ-LLDPEcan distinctly increase the impact strength of LLDPE/ATHblend, and improve the dispersion of ATHin LLDPEmatrix.By adding 10% γ-LLDPE (0.1 kGy/h, 50 kGy) of the matrix to ATH (50% by weight) fi1led LLDPE, the impact strength of blend can increase from 65 J/m to 260 J/m.

Key words: &gamma, irradiation, Linear low density polyethylene (LLDPE), Linear low density polyethylene/alumina trihydrate blend, Impact property

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XU Wen, XIAO Wang-Dong, XU Xi . A Study on Impact Properties of γ-Ray Irradiated LLDPE Filled with Alumina Trihydrate[J]. Chem. J. Chinese Universities, 1997, 18(1): 140.

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A Study on Impact Properties of γ-Ray Irradiated LLDPE Filled with Alumina Trihydrate

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