期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 133, 期 1, 页码 499-508出版社
SPRINGER
DOI: 10.1007/s10973-017-6785-3
关键词
Functional polymeric microspheres; Glycidyl methacrylate; Diels-Alder reaction; Maleic anhydride; Thermogravimetric analysis; TG/FTIR
资金
- European Union under REA [PIRSES-GA-2013-612484]
- Operational Programme Development of Eastern Poland [POPW.01.03.00-06-017/09-00]
The study describes the thermal properties of functional microspheres composed of glycidyl methacrylate (GMA) and crosslinking agent ethylene glycol dimethacrylate (EGDMA). Copolymeric poly(GMA-co-EGDMA) microspheres were prepared via suspension-emulsion polymerization in the presence of toluene and decan-1-ol as porogens. In order to introduce functional groups, the porous methacrylate network was modified by epoxy ring opening with the use of sodium cyclopentadienide and then the Diels-Alder addition with maleic anhydride. The thermal properties of poly(GMA-co-EGDMA) materials were evaluated by thermogravimetry and differential scanning calorimetry. By TG/FTIR, it was observed that new functional materials exhibited multi-staged decomposition patterns, different from parent poly(GMA-co-EGDMA) microspheres. The synthesized poly(GMA-co-EGDMA) microspheres exhibited rather high thermal stability in inert atmosphere. Their initial decomposition temperature determined at the temperature of 2% of mass loss was about 210 A degrees C; however, after the chemical modification it was slightly lower. The thermal degradation of parent poly(GMA-co-EGDMA) copolymer runs mainly according to the depolymerization mechanism, while functionalized by cyclopentadienyl group and maleic anhydride microspheres decompose through the chain scission mechanism.
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