Effect of Composition Factors on Mechanical Properties of PC/ABS Alloy Exposed to Alkylbenzene

doi:10.19491/j.issn.1001-9278.2021.11.007

Abstract

Abstract:

The tensile strain and tensile strength of PC/ABS alloy was tested after exposed to alkylbenzene using a universal tensile testing machine. The influence of alkylbenzene on mechanical properties of PC/ABS alloy was investigated. The results indicated that after 30 days of alkylbenzene impregnation at 60 ℃， PC/ABS alloys containing PE?G?MAH， ABS?G?MAH and POE?g?GMA showed a decrease in the rate of tensile strain at fracture by 58.8 %， 25.4 %， and 41.3 %， respectively. Compared to ABS， PC component is a key factor for the decrease of tensile strain at fracture. The effective compatibilizer can prolong the time for the PC/ABS alloy to maintain its mechanical property stability in alkylbenzene solvent. When the flame retardant was dispersed in PC/ABS matrix， a ductile?brittle transformation behavior is more likely to occur due to the osmosis effect of alkylbenzene.

Key words: polycarbonate, acrylonitrile?butadiene?styrene, alkylbenzene, tensile strain at fracture, tough?brittle transition

CLC Number:

TQ 323.4⁺1

BI Weifeng, LIU Jiaoshi, CHEN Shaojun, YUAN Hao, ZHANG Yanxia. Effect of Composition Factors on Mechanical Properties of PC/ABS Alloy Exposed to Alkylbenzene[J]. China Plastics, 2021, 35(11): 44-48.

Figures/Tables 5

样品	PC含量/%	ABS含量/%	相容剂及其含量	阻燃剂及其含量
纯PC	100	0	0	0
纯ABS	0	100	0	0
A1	70	30	0	0
A2	66	28.3	PE?g?MAH（5.7 %）	0
A3	66	28.3	ABS?g?MAH（5.7 %）	0
A4	66	28.3	POE?g?GMA（5.7 %）	0
A5	62.5	26.7	POE?g?GMA（5.4 %）、SMA（5.4 %）	0
A6	62.5	26.7	SMA（5.4 %）、EVA?g?MAH（5.4 %）	0
A7	62.5	26.7	POE?g?GMA（5.4 %）、EVA?g?MAH（5.4 %）	0
B1	55.6	23.8	ABS?g?MAH（4.8 %）	有机半倍硅氧烷（15.8 %）
B2	55.6	23.8	ABS?g?MAH（4.8 %）	十溴二苯乙烷（15.8 %）
B3	55.6	23.8	ABS?g?MAH（4.8 %）	磷酸二苯酯（15.8 %）

Tab.1. PC/ABS composite material ratio （mass fraction， the same below）

Fig.1. Tensile strength and tensile strain at break of pure PC and pure ABS aging in different environments

Fig.2. Tensile strength and tensile strain at break of PC/ABS alloy specimens with different compatibilizers aged in an alkylbenzene solvent at 70 ℃

Fig3. Tensile strength and tensile strain at break of compatibilized composite PC/ABS before and after aging treatment

Fig.4. Tensile strength and tensile strain at break of PC/ABS samples aged in 70 ℃ alkylbenzene solvent with different flame retardants

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