Synthesis and Properties of a Novel Thermally Conductive Pressure‐Sensitive Adhesive with UV‐Responsive Peelability. Issue 7 (22nd February 2023)

• Record Type: Journal Article
• Authors: Cui, Xiaohua; Liu, Jiaming; Zhang, Ending; Gong, Ziyang; Liang, Liyan; Shi, Jun; Hao, Xiaopeng; Hu, Jiwen; Lu, Mangeng
• Is Part Of: Macromolecular rapid communications. Volume 44:Issue 7(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-02-22
• Subjects: modified graphene -- pressure‐sensitive adhesives -- thermal conductivity -- UV‐responsive peelability; Macromolecules -- Periodicals; Polymers -- Periodicals; Chemistry -- Periodicals; 547.705
• DOI: 10.1002/marc.202200884
• Languages: English
• ISSNs: 1022-1336

Abstract

Abstract: Thermally conductive pressure‐sensitive adhesive (PSA) has received a great amount of attention in recent years, but the traditional PSA hardly loses adhesion properties after UV irradiation or heating. Therefore, endowing thermally conductive adhesive with UV‐responsive peelability becomes a design strategy. Herein, vinyl‐functionalized graphene (AA‐GMA‐G) is prepared by modifying graphene with acrylic acid and subsequently reacting with glycidyl methacrylate. Then, the UV‐curable acrylate copolymer is synthesized by grafting glycidyl methacrylate. Finally, the novel thermally conductivity PSA with UV‐responsive peelability is obtained by blending the copolymer with AA‐GMA‐G and photoinitiator. The results show that the PSA at 2 wt% AA‐GMA‐G loading exhibits an excellent thermal conductivity (0.74 W m −1 K −1 ) and a relatively strong peel strength, increasing by 15% compared with pristine graphene/PSA. Interestingly, the peel strength of AA‐GMA‐G/PSA can achieve a dramatic drop after UV treatment, and the decrease rate is 96.7%. Therefore, the novel thermally conductive PSA with UV‐responsive peelability has potential applications in certain electronic devices. Abstract : A novel thermally conductive pressure‐sensitive adhesive (PSA) with UV response is developed. The PSA not only exhibits excellent thermal conductivity and adhesion properties but also can achieve a sharp drop in peel strength after UV treatment. The novel and simple design strategy makes the PSA a great potential in certain electronic devices.