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Measurement and simple equation models of the specific heats of neat and glycerol‐plasticized poly(vinyl alcohol)
Author(s) -
Sin Lee Tin,
Rahman W.A.W.A.,
Rahmat A.R.,
Bee Soo Tueen,
Tee Tiam Ting,
Low Chong Yu
Publication year - 2012
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.20304
Subject(s) - vinyl alcohol , glycerol , differential scanning calorimetry , materials science , plasticizer , alcohol , polyvinyl alcohol , melting temperature , polymer chemistry , chemical engineering , composite material , organic chemistry , chemistry , thermodynamics , polymer , physics , engineering
The specific heats ( C sp ) of neat and glycerol‐plasticized poly(vinyl alcohol) (PVOH) were studied by differential scanning calorimetry at 330–530 K. Glycerol‐plasticized poly(vinyl alcohol) was prepared by a melt‐blending method. The outcomes were modeled into mathematical functions. Incorporation of glycerol increased the specific heat of PVOH. Glycerol provided internal lubrication to the PVOH system, giving a smoother and lower‐amplitude melting curve. As a result, glycerol‐plasticized PVOH had a lower melting‐temperature range than neat PVOH. However, higher energy was required to increase the temperature of glycerol‐plasticized PVOH. The modeling functions showed a best fits regression range of 0.967–0.999. Neat PVOH and glycerol‐plasticized PVOH required 1166.05 J/g and 2113.09 J/g, respectively, to increase the temperature from 330 to 530 K. J. VINYL ADDIT. TECHNOL., 18:198–203, 2012. © 2012 Society of Plastics Engineers