期刊
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
卷 11, 期 2, 页码 133-137出版社
SPRINGER
DOI: 10.1007/s10163-008-0225-1
关键词
Depolymerization; Recycled plastic; Supercritical alcohol; FRP; Unsaturated polyester
The synthesis of recycled plastics from recovered monomeric materials obtained from the depolymerization reaction of fiber-reinforced plastics (FRP) was examined. The depolymerization reaction of FRP in the presence of N,N-dimethylaminopyridine (DMAP) smoothly yielded the corresponding monomers, which mainly consisted of dimethyl phthalates. The polymerization reaction with this monomer failed to form the corresponding unsaturated polyesters due to contamination by N-methyl-4-pyridone, a decomposition product of DMAP. An efficient purification of the recovered monomer was achieved by washing with water, and the purified monomer successfully yielded the corresponding polymers. A hardness test revealed that the polymers were as hard as the polyester made from virgin materials. The present modification provides a practical method for the preparation of recycled plastics from depolymerized plastics.
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