Photo-stabilizing efficiency of N-substituted hindered amines in polypropylene : Effects of processing conditions and exposure to a protonic acid

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DOIResolve DOI: http://doi.org/10.1016/0141-3910(89)90008-6
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TypeArticle
Journal titlePolymer Degradation and Stability
Volume26
Issue2
Pages185195; # of pages: 11
AbstractThe effects of exposure to processing conditions and strongly acidic gases on the photo-stability of polypropylene films stabilized with hindered amine light stabilizers (HALS) have been studied. A series of monofunctional hindered amines based on tetramethylpiperidine containing 〉NH〉NO〉NCOCH₃ and 〉N--OC(==O0CH₃ substituents in the piperidyl ring was compared with a bifunctional secondary amine. Exposure to heat and shear in a Brabender Plastograph caused loss by volatilization and decomposition of the 〉N O C(==O)CH₃ additive. All of the HALS derivatives formed salts upon exposure to gaseous HCl and their photo-stabilizing ability was greatly impaired although the monofunctional secondary amine was superior to the bifunctional amine under these conditions. The 〉N-COCH₃ additive was extensively decomposed by the HCl exposure.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NRC number30094
NPARC number15677142
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Record identifier1afd09d3-6047-4d35-a4a1-c6a50b1d2872
Record created2010-06-15
Record modified2016-05-09
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