Synthesis and Characteristics of Novel Topologycalgel by Photopolymerization

Abstract

A novel supramolecular crosslinked polymer system (polybutadiene topologycal gel, PBTG) was constructed by combining two components, cyclodextrin (γ-CD) oligomer and terminal end-capped macromonomer having polybutadiene (PB) unit. Photopolymerization of N,N-dimethylacrylamide (DMAA) was carried out in the presence of PBTG to obtain gel composed of movable cross-linking. The obtained PBTG exhibited the unique property different that of a conventional chemical gel (PB-DMAA gel). The PBTG showed relatively high thermal stability and good film-forming property. The temperature for 10% weight loss of the polymers was 400°C. The stress and the strain of the PBTG were 0.325MPa and 590.2%, respectively. Young’s modulus was 0.55KPa. The gelled product swelled well in N,N-dimethylformamide (DMF ; percentage swelling 1580%) and water (H₂O ; percentage swelling 1460%).