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Structural evolution during inverse vulcanization.
Zheng, Botuo; Zhong, Liling; Wang, Xiaoxiao; Lin, Peiyao; Yang, Zezhou; Bai, Tianwen; Shen, Hang; Zhang, Huagui.
Afiliación
  • Zheng B; College of Chemistry and Materials Science, Fujian Key Laboratory of Polymer Materials, Fujian Normal University, Fuzhou, 350007, China.
  • Zhong L; College of Chemistry and Materials Science, Fujian Key Laboratory of Polymer Materials, Fujian Normal University, Fuzhou, 350007, China.
  • Wang X; College of Chemistry and Materials Science, Fujian Key Laboratory of Polymer Materials, Fujian Normal University, Fuzhou, 350007, China.
  • Lin P; College of Chemistry and Materials Science, Fujian Key Laboratory of Polymer Materials, Fujian Normal University, Fuzhou, 350007, China.
  • Yang Z; College of Chemistry and Materials Science, Fujian Key Laboratory of Polymer Materials, Fujian Normal University, Fuzhou, 350007, China.
  • Bai T; Key Laboratory of Medical Electronics and Digital Health of Zhejiang Province in Jiaxing University, College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, 314001, China. baitw@zjxu.edu.cn.
  • Shen H; College of Materials and Chemical Engineering, Minjiang University, Fuzhou, 350108, China. hang.shen@outlook.com.
  • Zhang H; College of Chemistry and Materials Science, Fujian Key Laboratory of Polymer Materials, Fujian Normal University, Fuzhou, 350007, China. huagui.zhang@fjnu.edu.cn.
Nat Commun ; 15(1): 5507, 2024 Jun 29.
Article en En | MEDLINE | ID: mdl-38951493
ABSTRACT
Inverse vulcanization exploits S8 to synthesize polysulfides. However, evolution of products and its mechanism during inverse vulcanization remains elusive. Herein, inverse vulcanization curves are obtained to describe the inverse vulcanization process in terms of three stages induction, curing and over-cure. The typical curves exhibit a moduli increment before declining or plateauing, reflecting the process of polysulfide network formation and loosing depending on monomers. For aromatic alkenes, in the over-cure, the crosslinked polysulfide evolves significantly into a sparse network with accelerated relaxation, due to the degradation of alkenyl moieties into thiocarbonyls. The inverse vulcanization product of olefins degrades slowly with fluctuated relaxation time and modulus because of the generation of thiophene moieties, while the inverse vulcanization curve of dicyclopentadiene has a plateau following curing stage. Confirmed by calculations, the mechanisms reveal the alkenyl groups react spontaneously into thiocarbonyls or thiophenes via similar sulfur-substituted alkenyl intermediates but with different energy barriers.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
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Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido