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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/14550

Title: The influence of pigments and additives on the crystallisation and warpage behaviour of polyethylenes
Authors: Chung, Chee Keong
Keywords: Dimensional stability
Crystalline orientation
High density polyethylene
Carboxylic acid salt
Calcium carbonate
Issue Date: 2013
Publisher: © C.K. Chung
Abstract: The primary reason for incorporating pigments into plastic materials is to impart the desired colour to finished articles. Some pigments however, may interact with the polymer leading to unexpected deleterious effects. Organic pigments, especially phthalocyanines, are favourable for their brilliant shade but are also well known for causing part distortion or warpage. This causes problems in parts which require good dimensional stability such as crates, containers, trays, caps and closures. Despite that, there are not many published studies on the root cause and mechanism of warpage induced by the pigment. Hence, the objective of this research is to study the influence of such pigments on the dimensional stability, crystallisation behaviour and morphology of polyethylenes in order to have a better understanding on the mechanism of warpage, which could possibly lead to a solution in overcoming this problem. [Continues.]
Description: A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.
Sponsor: Clariant (Singapore), BU Masterbatches
URI: https://dspace.lboro.ac.uk/2134/14550
Appears in Collections:PhD Theses (Materials)

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Thesis-2014-Chung.pdf13.78 MBAdobe PDFView/Open


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