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Analysis of the esterification process for poly(ethylene terephthalate)

✍ Scribed by Young-Cheol Ahn; Soo-Myung Choi


Publisher
The Polymer Society of Korea
Year
2003
Tongue
English
Weight
289 KB
Volume
11
Category
Article
ISSN
1598-5032

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## Abstract Near infrared (NIR) reflectance spectra recorded from poly(ethylene terephthalate) (PET) chips contain a sufficient amount of information to estimate the number of carboxylic end groups and the relative viscosity. To obtain reliable results, careful attention has to be paid to the calib

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After investigating kinetics of the UV photodegradation of PET film samples having a thickness of 4.4 m, we found that the photodegradation process takes place in two steps: a very rapid initial step followed by a normal step. This phenomenon is explained by using a concept of "weak links." We have