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- Title
Effect of copolymers synthesized by nitroxide‐mediated polymerization as chain extenders of postconsumer poly(ethylene terephthalate) waste.
- Authors
Benvenuta‐Tapia, Juan José; Vivaldo‐Lima, Eduardo; Guerrero‐Santos, Ramiro
- Abstract
In this contribution, the use of glycidyl methacrylate and styrene copolymers synthesized by nitroxide‐mediated polymerization (NMP) as chain extenders of postconsumer poly(ethylene terephthalate) waste (r‐PET) is described. Our observations revealed that the copolymers synthesized by NMP act as efficient chain extenders for the regeneration of PET waste. Epoxide groups in the copolymers react with PET end reactive groups producing chain extended PET with higher molecular weight and improving performance. The increase in molecular weight of PET waste results in important improvement in both, elongation‐at‐break, and strength impact. r‐PET complex viscosity and rheological moduli are also greatly improved as the epoxide content in the chain extenders increases. The loss tangent and phase angle versus angular frequency plots for chain‐extended r‐PET reveal that melt elasticity is also improved. These results confirm that use of NMP‐synthesized copolymers is a plausible solution for the recycling of PET. POLYM. ENG. SCI., 59:2255–2264, 2019. © 2019 Society of Plastics Engineers
- Subjects
SOCIETY of Plastics Engineers (Organization); COPOLYMERS; GLYCIDYL methacrylate; ETHYLENE; IMPACT strength; NITROXIDES; MOLECULAR weights; POLYURETHANE elastomers
- Publication
Polymer Engineering & Science, 2019, Vol 59, Issue 11, p2255
- ISSN
0032-3888
- Publication type
Article
- DOI
10.1002/pen.25228