S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Journal Papers (저널논문_화학생물공학부)
Plasticizer Effect on the Melting and Crystallization Behavior of Polyvinyl Alcohol
- Jang, Jyongsik; Lee, Dong Kweon
- Issue Date
- Polymer 2003;44:8139–8146
- The melting and crystallization behavior of polyvinyl alcohol (PVA) were examined as a function of plasticizer amount. The melting
temperature ðTmÞ of PVA decreased with increasing the amount of glycerin. The effect of a plasticizer rapidly diminished when the phase
separation of glycerin in PVA occurred. In addition, the crystallization peak temperature ðTcÞ of a fully hydrolysed PVA was reduced, and the
maximum crystallization rate ðKmaxÞ was retarded, and the crystallite size distribution ðv1=2Þ was widened. However, the crystallization
behavior (Tc; Kmax; v1=2) of a partially hydrolysed PVA could be disregarded compared with a fully hydrolysed PVA. The thermal history did
not affect the crystallization behavior of a fully hydrolysed PVA, but largely affected that of a partially hydrolysed PVA. In a fully hydrolysed
PVA / a partially hydrolysed PVA blend system, two Tm peaks appeared, and the concurrent crystallization occurred.
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