Effect of organic⁃inorganic compound antioxidant on structure and properties of polyphenylene sulfide

doi:10.19491/j.issn.1001-9278.2025.01.012

Abstract

Abstract:

An organic⁃inorganic compound antioxidant （GO⁃sHP） was prepared through chemical grafting of GA⁃80 into graphite oxide （GO） sheets. The resultant GO⁃sHP was melt⁃blended with polyphenylene sulfide （PPS） by using a micro⁃twin⁃screw extruder. The structure and properties of the obtained PPS blends were intensively analyzed. The results indicate that GO⁃sHP showed high thermal stability and could well be melt⁃blended with PPS. GO⁃sHP exhibited good compatibility with the PPS matrix and could be uniformly dispersed in the matrix without any agglomerations. The introduction of GO⁃sHP could promote the crystallization of PPS to improve its crystallinity. As the GO⁃sHP content increased， the crystallization temperature of PPS increased and its supercooling degree decreased. The introduction of GO⁃sHP improved the thermal stability of PPS， and its heat resistance temperature index increased with an increase in the GO⁃sHP content. The addition of GA⁃80 improved the tensile fracture strength of PPS significantly. After thermal oxidation treatment， pure PPS presented a decrease in the tensile fracture strength by 4.1 %. However， the PPS blend containing 0.3 wt% GO⁃sHP showed a decrease in the tensile fracture strength only by 2.4 %.

Key words: polyphenylene sulfide, graphite oxide, organic?inorganic compound antioxidant, crystallization properties, oxidation resistance

CLC Number:

TQ326.5

LI Rongnan, YIN Maoli, LIU Feng, HU Chenggong, XING Jian. Effect of organic⁃inorganic compound antioxidant on structure and properties of polyphenylene sulfide[J]. China Plastics, 2025, 39(1): 75-79.

Figures/Tables 8

Fig.1. FTIR spectra of GO， sHP and GO⁃sHP

Fig.2. TG curves of GO， sHP and GO⁃sHP

Fig.3. SEM of pure PPS and PPSGS x composites

Fig.4. DSC curves of pure PPS and PPSGS X

样品	$T c /$ ℃	$∆ H c$ /J·g^-1	$T m /$ ℃	$∆ H m /$ J·g^-1	$X c /$ %	$∆$ T/℃
PPS	214.0	30.3	276.3	35.4	45.7	62.3
$P P S G S 0.1$	217.0	31.4	279.3	35.8	46.2	62.3
$P P S G S 0.3$	218.0	31.6	280.1	38.1	49.3	62.1
$P P S G S 0.5$	224.4	32.4	279.2	46.2	60.4	54.8
$P P S G S 1$	227.7	35.5	278.7	40.9	53.3	51.0

样品	$T c /$ ℃	$∆ H c$ /J·g^-1	$T m /$ ℃	$∆ H m /$ J·g^-1	$X c /$ %	$∆$ T/℃
PPS	214.0	30.3	276.3	35.4	45.7	62.3
$P P S G S 0.1$	217.0	31.4	279.3	35.8	46.2	62.3
$P P S G S 0.3$	218.0	31.6	280.1	38.1	49.3	62.1
$P P S G S 0.5$	224.4	32.4	279.2	46.2	60.4	54.8
$P P S G S 1$	227.7	35.5	278.7	40.9	53.3	51.0

Tab.1. DSC curves analysis results of PPS and PPSGS X composites

Fig.5. TG curves of PPS and PPSGS X composites

样品	$T 5 % /$ ℃	$T 15 % /$ ℃	$T 30 % /$ ℃	T_HRI/℃
PPS	496.7	515.0	535.5	254.8
$P P S G S 0.1$	498.8	516.2	541.7	257.0
$P P S G S 0.3$	497.3	517.7	544.2	257.5
$P P S G S 0.5$	499.7	522.7	544.3	258.0
$P P S G S 1$	498.5	516.5	538.7	256.1

样品	$T 5 % /$ ℃	$T 15 % /$ ℃	$T 30 % /$ ℃	T_HRI/℃
PPS	496.7	515.0	535.5	254.8
$P P S G S 0.1$	498.8	516.2	541.7	257.0
$P P S G S 0.3$	497.3	517.7	544.2	257.5
$P P S G S 0.5$	499.7	522.7	544.3	258.0
$P P S G S 1$	498.5	516.5	538.7	256.1

Tab.2. TG analysis results of PPS and PPSGS X composites

Fig.6. Tensile breaking strength of PPS and PPSGS x nanocomposites before and after oxidation treatment

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