ISSN:
0003-3146
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The stabilization of polyamides or nylons, considered the oldest engineering plastics, has been the subject of many patents in the last 50 years. Most of these patents refer to attempts to improve the resistance of polyamides against the negative influence of heat and oxygen. Light stability, however, was always of certain interest as well, and more so in recent years when polyamide producers started to search seriously for new fields of application.Some general remarks will be made on how to test the heat stability of this substrate group. The three different types of heat stabilizing systems with their advantages and disadvantages will be discussed briefly. Among these three systems - copper halides, secondary aromatic amines and phenolic antioxidants - the latter will be dealt with in some depth.Some information will cover investigations on stabilization of polyamides in general. Another study will be presented that deals with the behavior of polyamide 6 at various elevated temperatures. The results of an extraction of polyamide 66 with boiling water will be explained including discussion of the consequences.An example will also be given for the heat stabilization of polyamide 12.Some general remarks on testing polyamides under the influence of light lead to several considerations concerning light stabilizer systems for polyamides. Examples will be given for polyamides 6, 66 and 12.A short survey of the status quo with regard to polyamide stabilization and an outlook for the future will conclude this paper.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/apmc.1985.051370107
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