Effect of Co-stabilizers on the Properties of Ba/Zn System

doi:10.7503/cjcu20170156

Abstract

Abstract:

The transparency of polyvinyl chloride(PVC) stabilized with barium isooctoate and zinc isooctoate(Ba/Zn) was discussed. Then formulations based on Ba/Zn with hydrotalcite(LDH), phosphite ester and β-diketone were fully characterized which showed good initial color and obvious increase in transparency respectively. Afterwards, the thermal stability of PVC in the presence of Ba/Zn and LDH was studied by testing the static and dynamic stabilities, thermalaging properties and conductivity. The results showed that LDH used as costabilizer could enhance the thermal stabilities of PVC significantly, which also indicated that a strong synergistic effct between Ba/Zn and LDH. Finally, evaluation of the use of three different co-stabilizers for PVC stabilization were carried out by thermogravimetric analysis. The curves presented that all of them could improve the primeval thermal stabilities of PVC.

Key words: Luminousness, Haze, Hydrotalcite, Phosphite ester, β-Diketone, Polyvinyl chloride, Ba/Zn composite system, Synergistic effect, Initial thermal stability

CLC Number:

TrendMD:

LI Wei, WU Suhua, Ren Xinxin. Effect of Co-stabilizers on the Properties of Ba/Zn System[J]. Chem. J. Chinese Universities, 2017, 38(11): 2089.

Figures/Tables 8

Fig.1 Effect of different mass ratios of Ba/Zn on the transparency of PVC

Fig.2 Effect of adding LDH on the transparency of PVC

Fig.3 Effect of adding phosphite ester on the transparency of PVC

Fig.4 Effect of adding β-diketone on the transparency of PVC

Fig.5 Effect of adding LDH on the thermal stability of PVC

Table 1 Effect of adding LDH on the thermal ageing property of PVC

Fig.6 Electrical conductivity-time curves of PVC stabilized with different mass fraction of LDHa. Ba/Zn; b. 5%LDH; c. 10%LDH; d. 15%LDH; e. 25%LDH; f. 35%LDH.

Fig.7 TG analysis curves of PVC stabilized by different thermal stabilizersa. Ba/Zn; b. 15%LDH; c. 15%phosphite ester; d. 15%β-diketone.

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