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Synthesis of Hybrid Polyacetylene Gels Using Octafunctional POSS Initiator

2007; Wiley; Volume: 249-250; Issue: 1 Linguagem: Inglês

10.1002/masy.200750437

1521-3900

Kyung‐Min Kim, Jung‐Hyurk Lim, Nae‐Youn Jang, Sung‐Ryong Kim,

biodegradable polymer synthesis and properties

Abstract Hybrid polyacetylene gels having polyhedral oligomeric silsesquioxanes (POSS) moieties were prepared by polymerization of 2‐ethynylpyridine using octafunctional POSS as an initiator with changing the feed ratio of POSS to 2‐ethynylpyridine. The resulting black polyacetylene gels were not soluble in any organic solvents such as THF, chloroform, methanol, DMF, and acetone. The polyacetylene gels with higher mole ratio of 2‐ethynylpyridine to POSS show higher thermal stability because of the tight polymer network caused by high degree of polymerization. It is proposed that the tether structure between polyacetylene matrix and POSS cages was crucial to the great improvement in thermal stabilities of hybrid polyacetylene gels with POSS.