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Evaluation of novel derivatives of 2,2‐dimethyl‐1,3‐diaminopropane as thermal and UV stabilizers in medium‐density polyethylene films
Author(s) -
Berlanga Duarte M. L.,
Rosales Jasso A.,
Allen N. S.
Publication year - 2003
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.10084
Subject(s) - polyethylene , amine gas treating , nitroxyl , quenching (fluorescence) , thermal stability , polymer chemistry , alkyl , materials science , organic chemistry , chemistry , fluorescence , physics , quantum mechanics
Novel oligoalkylenamines (Additive A2) were obtained by the reaction between 2,2‐dichloropropane and 1,3‐diamino‐2,2‐dimethylpropane. The presence of partially hindered amine groups in the product was confirmed by NMR. The amines were evaluated as thermal and UV stabilizers in medium‐density polyethylene (MDPE) films containing Irganox 1330 (PEA2Ir), Chimassorb 944 (PEA2CH), or a mixture of Irganox 1330 and Chimassorb 944 (PEA2M) by following changes in the concentration of carbonyl groups in the IR region of 1718 cm −1 . Under UV aging, the amine mixture A2 interacts with Chimassorb 944 in a synergistic way that is explained by the quenching of charge transfer complexes. Under thermal aging, a synergistic effect was observed in formulations containing Irganox 1330. It is still not clear if alkyl ethers of hydroxylamines from A2 are more stable at 100°C or if their nitroxyl radicals are more reactive than the corresponding species from Chimassorb 944.