A Highly Stretchable and Autonomous Self‐Healing Polymer Based on Combination of Pt···Pt and π–π Interactions. Issue 20 (29th August 2016)

• Record Type: Journal Article
• Authors: Mei, Jin‐Feng; Jia, Xiao‐Yong; Lai, Jian‐Cheng; Sun, Yang; Li, Cheng‐Hui; Wu, Jun‐Hua; Cao, Yi; You, Xiao‐Zeng; Bao, Zhenan
• Is Part Of: Macromolecular rapid communications. Volume 37:Issue 20(2016)
• Page Start: 1667
• Page End: 1675
• Publication Date: 2016-08-29
• Subjects: platinum complexes -- polymers -- self‐healing -- stretchable; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.201600428
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract : A new self‐healing polymer has been obtained by incorporating a cyclometalated platinum(II) complex Pt(C ∧ N ∧ N)Cl (C ∧ N ∧ N = 6‐phenyl‐2, 2′‐bipyridyl) into a polydimethylsiloxane (PDMS) backbone. The molecular interactions (a combination of Pt···Pt and π–π interactions) between cyclometalated platinum(II) complexes are strong enough to crosslink the linear PDMS polymer chains into an elastic film. The as prepared polymer can be stretched to over 20 times of its original length. When damaged, the polymer can be healed at room temperature without any healants or external stimuli. Moreover, the self‐healing is insensitive to surface aging. This work represents the first example where the attractive metallophilic inter­actions are utilized to design self‐healing materials. Moreover, our results suggest that the stretchability and self‐healing properties can be obtained simultaneously without any conflict by optimizing the strength of crosslinking interactions. Abstract : A highly stretchable and autonomous self‐healing film is obtained by the combination of Pt···Pt and π–π interactions into PDMS polymer. Owning to the mediate strength, the as prepared polymer can be stretched to over 20 times of its original length. When damaged, the polymer is able to completely heal at room temperature within 12 h without any external stimuli.