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Experimental study of the influence of raw material impurities on yellowness index of transesterification polycarbonate
Author(s) -
Godínez Carlos,
de los Rios Antonia P.,
HernándezFernández Francisco J.,
Lozano Luis J.,
Baraza Xavier,
Mardomingo Eva
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.32895
Subject(s) - polycarbonate , impurity , raw material , factorial experiment , transesterification , fractional factorial design , materials science , chemical engineering , manufacturing process , chemistry , composite material , organic chemistry , methanol , mathematics , engineering , statistics
This article covers a quantitative experimental study on the influence of raw materials and materials of construction impurities on polycarbonate color as expressed by a solution yellowness index. Major impurities in the production process were identified, synthesized, and spiked into the baseline materials. A fractional factorial experimental design was executed to provide some information of the influence of impurities as corresponding to levels similar to those occurring in the manufacturing practice. Analysis of the experimental design showed that isopropenylphenol (IPP), methoxyphenyl benzoate (MOB) and 9,9‐dimethylxanthene (DMX) are the main producers of color bodies. A quantitative expression was derived which can be used to predict manufacturing problems with regards to color. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011