Homo- and copolymers of hexafluoroisopropyl methacrylate and α-fluoroacrylate with alkyl vinyl ethers: Microstructure and thermal properties
✍ Scribed by Valter Castelvetro; Lorenzo Montagnini di Mirabello; Mauro Aglietto; Elisa Passaglia
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 206 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0887-624X
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✦ Synopsis
A study is reported, dealing with the microstructure and thermal behavior of the homopolymers of 1,1,1,3,3,3-hexafluoroisopropyl methacrylate (HFIM) and 1,1,1,3,3,3-hexafluoroisopropyl ␣-fluoroacrylate (HFIFA), as well as of their copolymers with various vinyl ethers. The aim of this work was a better understanding of the role that fluorine content and distribution-first in the monomer and then along the ensuring macromolecular chain-play in determining the polymerizability of the selected vinyl monomers, and the final properties of the polymeric material. Primary (n-butyl, isobutyl, 2-ethylhexyl), secondary (cyclohexyl), and tertiary (tert-butyl) vinyl ethers were employed as the comonomers. A general tendency towards comonomer alternation was observed upon radical initiated copolymerization with HFIFA. On the other hand, the relatively more electron-rich HFIM did not usually yield strictly alternating sequences, unless the bulky tert-butyl vinyl ether was employed. The incorporation of electron-rich vinyl ether monomers within a partially fluorinated polymeric chain by simple radical initiated process was considered particularly interesting in view of the possible application of these materials as water-repellent protective coatings. In this case, the fluorinated units should provide the low energy surface (water repellency) and, possibly, photo-and thermostability, whereas the vinyl ether counits should grant improved adhesion and adequate film-forming properties.