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Evaluation of three methods for the measurement of crystallinity of pet resins, preforms, and bottles
Author(s) -
Bashir Z.,
AlAloush I.,
AlRaqibah I.,
Ibrahim M.
Publication year - 2000
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.11376
Subject(s) - crystallinity , differential scanning calorimetry , bottle , materials science , crystallization , composite material , chemical engineering , thermodynamics , engineering , physics
The control of crystallization is important at all processing stages of the PET bottle industry, from the manufacture of bottle resins to the fabrication of preforms and bottles. In this work, we sought to evaluate critically three methods of crystallinity measurement. We have used density, Differential Scanning Calorimetry (DSC), and Modulated Differential Scanning Calorimetry (MDSC) to study the crystallinity of PET chips, preforms, and bottles. The accuracy, precision, and general validity of each technique and the problems of interpretation are discussed.