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Fluoro‐functionalized PLA polymers as potential water‐repellent coating materials for protection of stone
Author(s) -
Giuntoli Giulia,
Rosi Luca,
Frediani Marco,
Sacchi Barbara,
Frediani Piero
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.36469
Subject(s) - lactide , polymer , materials science , copolymer , polymerization , benzyl alcohol , polymer chemistry , coating , chemical engineering , chemistry , organic chemistry , catalysis , composite material , engineering
Abstract A series of sixteen fluoro‐functionalized poly(lactic acid)s were synthesised using two commercial fluorinated alcohols [3,3,4,4,5,5,6,6,7,7,8,8,8‐tridecafluoro‐1‐octanol and 4‐(3,3,4,4,5,5,6,6,7,7,8,8,8‐tridecafluorooctyl)benzyl alcohol] as co‐initiators in the ring‐opening polymerization of L‐lactide and rac‐lactide (the racemic mixture of L‐ and D‐lactide) catalyzed by Tin(II) 2‐ethylhexanoate. The polymers were characterized by NMR, IR, GPC, DSC and tested as potential protective coating for stone. The performances were comparatively evaluated in terms of water protection efficacy and colour changes of the treated stone. Furthermore, the photo‐stability of nine selected polymers under Solar Box condition was also investigated. It has been shown that the presence of fluorine makes the stone more water‐repellent. The polymers showed also interesting photo‐stability and some of them provided a behavior close to PLA‐FLK‐PLA block copolymers recently reported in the literature, in spite of their lower fluorine content © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012