Thermosetting resins from a tetra‐functional vinylbenzene compound possessing cyclic siloxane cores. Issue 17 (26th June 2021)

• Record Type: Journal Article
• Authors: Lee, Hsuan‐Wei; Chang, Li‐Ming; Liu, Ying‐Ling
• Is Part Of: Journal of polymer science. Volume 59:Issue 17(2021)
• Page Start: 1912
• Page End: 1918
• Publication Date: 2021-06-26
• Subjects: crosslinking -- low dielectric -- siloxane -- thermosetting resins -- vinylbenzene; Polymers -- Periodicals; Polymerization -- Periodicals; Polymerization; Polymers; Periodicals; 547.7
• DOI: 10.1002/pol.20210380
• Languages: English
• ISSNs: 2642-4150

Abstract

Abstract: Cyclic siloxane is an attractive building block for incorporation of silicon‐containing units as well as their distinguished properties to polymer materials. This work reports the synthesis and characterization of a tetra‐functional vinylbenzene compound possessing cyclic siloxane cores (cD4 ‐4VB). Synthesis of cD4 ‐4VB is carried out using cD4 ‐4SiH as the reactive precursor and multiple‐step reactions, including hydrosilylation, deacetylation, and SN 2 substitution. cD4 ‐4VB is an effective monomer for preparation of the corresponding cyclic silicon‐based thermosetting resins (CR‐cD4 ‐4VB). CR‐cD4 ‐4VB shows attractive film formability and good thermo‐mechanical properties, including a storage modulus of 2.0 GPa, a glass transition temperature of 282°C, a thermal stability above 400°C, a high char yield (at 800°C in nitrogen) of 55 wt%, and a dielectric constant of 3.12 at 10 GHz. This kind of resins have potential of application for halogen‐free flame retardants and high‐performance polymer films. Abstract :