The F···H Hydrogen Bonding Effect on the Dynamic Mechanical and Shape‐Memory Properties of a Fluorine‐Containing Polybenzoxazine. Issue 15 (22nd May 2017)

• Record Type: Journal Article
• Authors: Liu, Yanfang; Wang, Rongrong; An, Qin; Su, Xuehui; Li, Cuiyun; Shen, Shanshan; Huo, Guoyan
• Is Part Of: Macromolecular chemistry and physics. Volume 218:Issue 15(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-05-22
• Subjects: glass transition -- hydrogen bond -- organofluorine -- polybenzoxazine -- shape‐memory polymer; Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.201700079
• Languages: English
• ISSNs: 1022-1352

Abstract

Abstract : A fluorine‐containing difunctional benzoxazine is synthesized by hydrosilylation of an allyl‐ and fluorine‐containing monofunctional benzoxazine. The resultant polybenzoxazine possesses a broad glass transition temperature range and exhibits triple‐shape‐memory behaviors. The dynamic mechanical and shape‐memory properties of the polybenzoxazine are influenced by the combined effect of the cross‐linking density and the intermolecular ArF···HO hydrogen bonding. Abstract : A fluorine‐containing difunctional benzoxazine is synthesized by hydrosilylation of a monofunctional benzoxazine based on o ‐allylphenol and p ‐fluoroaniline. Besides the intramolecular and intermolecular hydrogen bonding associated with the nitrogen and oxygen atoms in the oxazine ring, specific self‐complementary intermolecular ArF···HO hydrogen bonding is formed in the polymerization of the benzoxazine, which leads to the resultant polybenzoxazine possessing a broad glass transition temperature range and showing two not well‐separated transitions. Based on the two glass transition temperatures, the polybenzoxazine exhibits triple‐shape‐memory behaviors by manipulating temperature and strain in the shape fixing process under tensile and bending modes. The dynamic mechanical and shape‐memory properties of the polybenzoxazine are influenced by the combined effect of the cross‐linking density and the ArF···HO hydrogen bonding.