| Title | Unravelling the dynamic crosslinking mechanism in polyborosiloxane |
| Author | |
| Corresponding Author | Zhang, Xin; Tok, Alfred ling Yoong |
| Publication Years | 2023-10-01
|
| DOI | |
| Source Title | |
| ISSN | 2468-5194
|
| Volume | 33 |
| Abstract | This study offers a comprehensive investigation into the mechanism behind the dynamic crosslinking of polyborosiloxane (PBS). Despite this material being well known for over 70 years, the origin of PBS's unique viscoelastic properties has been a topic of debate in the literature. Through combined FTIR and solid-state 29Si and 11B MAS NMR analyses, this study provides evidence that the formation of Si-O-B dynamic covalent bonds, along with their associative exchange with neighboring hydroxyl-bearing species (free silanol, water, alcohol, etc.), drives the gelation and viscoelastic behavior of PBS. Results show no indication of hydrogen or dative bonding, instead the low energy barrier for formation and breakage of Si-O-B bonds allows for easy exchange at room temperature. Moreover, the study finds that the viscoelastic properties of PBS can be adjusted by the choice of boron B-O functionality, leading to n-functional dynamic crosslinking through Si-O-B bonds. This research provides a clear understanding of the mechanism of dynamic crosslinking in PBS, resolving long-standing controversies in the field. |
| Keywords | |
| URL | [Source Record] |
| Indexed By | |
| Language | English
|
| SUSTech Authorship | Corresponding
|
| Funding Project | EPSRC["EP/K024418/1","AM1"]
; Birmingham Science City[RG57/21]
; Ministry of Education (MOE)["AcRF Tier 1","AcRF Tier 2"]
; AcRF Tier 2[AcRF Tier 2]
; null[EP/M028186/1]
|
| WOS Research Area | Chemistry
; Materials Science
|
| WOS Subject | Chemistry, Multidisciplinary
; Materials Science, Multidisciplinary
|
| WOS Accession No | WOS:001057831100001
|
| Publisher | |
| Data Source | Web of Science
|
| Citation statistics |
Cited Times [WOS]:0
|
| Document Type | Journal Article |
| Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/559369 |
| Department | Department of Mechanics and Aerospace Engineering |
| Affiliation | 1.Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave Block N4-1-02-23, Singapore 639798, Singapore 2.Nanyang Technol Univ, Sch Phys & Math Sci, Singapore 637371, Singapore 3.Univ Warwick, Dept Phys, Coventry CV4 7AL, England 4.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Guangdong, Peoples R China 5.Coll Engn, 1088 Hueyuan Ave,8F South Tower, Shenzhen 518055, Guangdong, Peoples R China |
| Corresponding Author Affilication | Department of Mechanics and Aerospace Engineering |
| Recommended Citation GB/T 7714 |
Kurkin, Anatoli,Lekina, Yulia,Bradley, David G.,et al. Unravelling the dynamic crosslinking mechanism in polyborosiloxane[J]. MATERIALS TODAY CHEMISTRY,2023,33.
|
| APA |
Kurkin, Anatoli.,Lekina, Yulia.,Bradley, David G..,Seah, Geok Leng.,Tan, Kwan Wee.,...&Tok, Alfred ling Yoong.(2023).Unravelling the dynamic crosslinking mechanism in polyborosiloxane.MATERIALS TODAY CHEMISTRY,33.
|
| MLA |
Kurkin, Anatoli,et al."Unravelling the dynamic crosslinking mechanism in polyborosiloxane".MATERIALS TODAY CHEMISTRY 33(2023).
|
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