SciELO - Scientific Electronic Library Online

 
vol.25 número6Design of conformal cooling for plastic injection moulding by heat transfer simulationBiobased additive plasticizing Polylactic acid (PLA) índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Polímeros

versão impressa ISSN 0104-1428versão On-line ISSN 1678-5169

Resumo

CHINELATTO, Marcelo Aparecido; AGNELLI, José Augusto Marcondes  e  CANEVAROLO, Sebastião Vicente. Synthesis and photostabilizing performance of a polymeric HALS based on 1,2,2,6,6-pentamethylpiperidine and vinyl acetate. Polímeros [online]. 2015, vol.25, n.6, pp.575-580.  Epub 04-Dez-2015. ISSN 1678-5169.  https://doi.org/10.1590/0104-1428.2057.

Polymeric hindered amine light stabilizers (polymeric HALS) have been extensively studied because they combine a high ability to protect the polymers against harmful effects of weathering with minimum physical loss. In this study a new polymeric N-methylated HALS was synthesized by the radical copolymerization of a cyclic tertiary amine with vinyl acetate (VAc). 4-Acryloyloxy-1,2,2,6,6-pentamethylpiperidine (APP), the cyclic tertiary amine, was prepared by the initial conversion of 2,2,6,6-tetramethyl-4-piperidinol derivatives via two different routes. The APP/VAc copolymer synthesized was characterized by size exclusion chromatography (SEC), Fourier transform infrared spectroscopy (FTIR) and carbon-13 nuclear magnetic resonance (13C NMR). The photostabilizing performance, particularly the induction period of polypropylene (PP) films containing different concentrations of APP/VAc copolymer, when exposed to accelerated aging, was comparable to that of PP films compounded with commercial polymeric HALS.

Palavras-chave : degradation; HALS; hindered amines; photo-oxidation; photostabilizer.

        · texto em Inglês     · Inglês ( pdf )