Study on damping performance of nitrile rubber powder⁃modified high⁃impact polystyrene

doi:10.19491/j.issn.1001-9278.2025.02.003

Abstract

Abstract:

A type of damping masterbatch was prepared through blending and extrusion using homopolymer polypropylene and nitrile rubber powders as raw materials， and the effect of masterbatch content on the mechanical， damping， and thermal properties of modified high⁃impact polystyrene （HIPS） were investigated. The result indicated that， when the content of the masterbatch was 30 wt%， the notch impact strength of the modified HIPS decreased from 9.1 kJ/m² to 3.5 kJ/m²， and its tensile strength decreased from 34.1 MPa to 21.3 MPa，its loss factor at 20 ℃ increased from 0.015 to 0.26， and its loss factor at 60 ℃ increased from 0.023 to 0.034. Thermogravimetric analysis results indicated that the heat resistance of the modified HIPS increased with an increase in the content of the damping masterbatch.

Key words: nitrile rubber powder, high?impact polystyrene, damping performance, loss factor

CLC Number:

TQ325.2

LI Guolin. Study on damping performance of nitrile rubber powder⁃modified high⁃impact polystyrene[J]. China Plastics, 2025, 39(2): 12-14.

Figures/Tables 5

Fig.1. Effect of damping masterbatch content on mechanical properties of the HIPS

母粒含量/%	缺口冲击强度/kJ·m^-2	拉伸强度/MPa	弯曲模量/MPa
0	9.1	34.1	2 345
10	6.8	27.7	2 153
20	4.9	24.6	1 962
30	3.5	21.3	1 799

Tab.1. Mechanical properties of the HIPS with different contents of damping masterbatch

Fig.2. TG curves of the HIPS with different damping masterbatch contents

Fig.3. Changes of loss factor and storage modulus of the HIPS with different contents of damping masterbatch with temperature

母粒含量/%	损耗因子		储能模量/MPa
母粒含量/%	20 ℃	60 ℃	20 ℃	60 ℃
0	0.015	0.023	2 226.3	1 944.7
10	0.019	0.025	1 969.4	1 697.4
20	0.021	0.029	1 925.1	1 593.6
30	0.026	0.034	1 710.1	1 361.6
100	0.070	0.093	694.1	309.8

Tab.2. Loss factor and storage modulus of the HIPS with different contents of damping masterbatch

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