Synthesis of a Novel Polyester Plasticizer and Its Plasticizing Effect in Poly(vinylchloride)†

doi:10.7503/cjcu20150223

Abstract

Abstract:

A novel plasticizer based on the hydrogenation of itaconic acid, poly(1,3-propylene 2-methyl-succinate)(1,3-PPM) was synthesized by 1,3-propanediol and 2-methylsuccinate acid through melt polycondensation. The plasticizing effect in poly(vinyl chloride)(PVC) was characterized. The results showed that 1,3-PPM displayed excellent compatibility with PVC. The glass transition temperature, tensile strength, tensile modulus and hardness of PVC films plasticized by 1,3-PPM decreased and elongation at break increased significantly with the increasing of plasticizer. Furthermore, compared to the traditional plasticizer dioctyl phthalate(DOP), 1,3-PPM had superior durability(volatility resistance, extractability and migration stability).

Key words: Poly(1, 3-propylene 2-methylsuccinate), Poly(vinyl chloride), Plasticizer, Durability

CLC Number:

TrendMD:

GAO Chuanhui, GUO Fangrong, WANG Xiaohong, ZHANG Xinhua, WANG Chuanxing, WU Yumin. Synthesis of a Novel Polyester Plasticizer and Its Plasticizing Effect in Poly(vinylchloride)^†[J]. Chem. J. Chinese Universities, 2015, 36(8): 1634.

Figures/Tables 9

Scheme 1 Structural formula of 1,3-PPM

Fig.1 FTIR spectrum of 1,3-PPM

Fig.2 1H NMR spectrum of 1,3-PPM

Fig.3 GPC spectrum of 1,3-PPM

Fig.4 SEM images of PVC plasticized by 1,3-PPM with different concentrations(A) 40 phr; (B) 50 phr; (C) 60 phr; (D) 70 phr; (E) 80 phr. phr: parts per hundred of resin.

Fig.5 DMA of PVC plasticized by 1,3-PPM with different concentrationsa. 40 phr; b. 50 phr; c. 60 phr; d. 70 phr;e. 80 phr.

Fig.6 Mechanical properties of PVC/1,3-PPM(a) and PVC/DOP(b)(A) Elongation at break; (B) tensile modulus; (C) tensile strength.

Table 1 Surface hardness of PVC films*

Compound	Concentration(phr)	Shore hardness
1,3-PPM	40	33(HD)
	50	30(HD)
	60	82(HA)
	70	78(HA)
	80	72(HA)
DOP	40	85(HA)
	50	81(HA)
	60	78(HA)
	70	75(HA)
	80	67(HA)
PVC		82(HD)

Table 2 Mass loss of 1,3-PPM and DOP in different mediums

Medium	Mass loss rate(%)		Measurement condition
Medium	DOP		1,3-PPM
Ethanol	9.60	1.89	20 ℃, 48 h
Cyclohexane	16.52	5.45	20 ℃, 48 h
Xylene	20.36	4.35	20 ℃, 48 h
Activated carbon	1.69	0.52	40 ℃, 48 h
Natural rubber	4.12	1.54	70 ℃, 0.5 MPa, 7 d

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