Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (10): 2451.doi: 10.7503/cjcu20130109

• Polymer Chemistry • Previous Articles    

Melt Processing of PVA with Magnesium Chloride and Polyethylene Glycol as the Complex Plasticizer

JIANG Xian-cai, SONG Jie, JIANG Ting, DAI Hua, ZHANG Xi   

  1. State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
  • Received:2013-01-30 Online:2013-10-10 Published:2013-10-10

Abstract:

Poly(vinyl alcohol)(PVA) samples were prepared through the melt processing by employing magnesium chloride and polyethylene glycol(PEG) as the complex plasticizer. The interaction between the complex plasticizer and PVA was investigated by Fourier transform infrared spectroscopy(FTIR). The influences of the complex plasticizer on the crystalline and thermal properties were studied by X-ray diffraction(XRD), differential scanning calorimetry(DSC) and thermogravimetric analysis(TGA), respectively. The results show that the plasticizer can effectively destroy the hydrogen bonding between PVA molecules. The crystallinity of PVA decreased rapidly with the addition of the complex plasticizer. Thermal measurements show that the melting point(Tm) of PVA decreases, the thermal stability improves and thus the thermal processing of PVA are achieved. The obtained PVA film shows good mechanical property, with the tensile strength of 31 MPa and the elongation at break of 466%.

Key words: Poly(vinyl alcohol), Complex plasticizer, Magnesium chloride hexahydrate, Polyethylene glycol, Mechanical property

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