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Abstract The present work describes synthesis and characterization of new modified Poly (vinyl chloride) polymer containing amino and mercapto - derivatives as pendent groups in the repeating units. This is performed via reacting of heterocyclic compound contain thiol and amine groups with PVC in tetrahydrofuran as solvent. The structure of modified PVC polymer was characterized by IR and 1H-NMR. The Photostability of modified PVC polymer was investigated under irradiation with ultra violet radiation from mercury vapor lamp 150 watt. The photostability effects of this heterocyclic compound depends on the basicity of carbonyl, alkene and hydroxyl indexes. The obtained results showed that the photostability of modified PVC polymer was decreased with increasing of irradiation time and with elevation of reaction temperature as well as in case of increasing of period of illumination.

Index code	Element
ti	article title
au	author
kw	article keywords
subject	subject (title words, abstract and keywords)
ab	abstract
ta	journal short title (e.g. Cad. Saúde Pública)
journal_title	journal full title (e.g. Cadernos de Saúde Pública)
la	publication language code (e.g. pt - Portuguese, es - Spanish)
type	document type
pid	publication identifier
publication_year	publication year of publication
sponsor	sponsor
aff_country	country code of the author's affiliation
aff_institution	author affiliation institution
volume	article volume
issue	article issue
elocation	elocation
doi	DOI number
issn	journal ISSN
in	SciELO colection code (e.g. scl - Brasil, col - Colômbia)
use_license	article usage license code

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