Fabrication of Enhanced Mechanical Properties and Intrinsic Flame-Retardant Polyurethane Elastomer Containing 4-(Phenylethynyl) Di(Ethylene Glycol) Phthalate
In this study, the aromatic acetylene compound 4-(phenylethynyl) di(ethylene glycol) phthalate (PEPE) was used as a chain extender, partially replacing 1,4-butanediol. To synthesize an intrinsic flame-retardant thermoplastic polyurethane elastomer (TPU) with an aromatic acetylene structure, PEPE was...
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doaj-e73de86d63914784b01a8ae8af0e11d42021-08-06T15:29:38ZengMDPI AGPolymers2073-43602021-07-01132388238810.3390/polym13152388Fabrication of Enhanced Mechanical Properties and Intrinsic Flame-Retardant Polyurethane Elastomer Containing 4-(Phenylethynyl) Di(Ethylene Glycol) PhthalateMeina Xie0Daikun Jia1Jin Hu2Jiyu He3Xiangmei Li4Rongjie Yang5School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaSchool of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, ChinaIn this study, the aromatic acetylene compound 4-(phenylethynyl) di(ethylene glycol) phthalate (PEPE) was used as a chain extender, partially replacing 1,4-butanediol. To synthesize an intrinsic flame-retardant thermoplastic polyurethane elastomer (TPU) with an aromatic acetylene structure, PEPE was synthesized by a two-step polymerization. The flame retardancy, thermal stability, and mechanical properties of TPU were studied. The microstructure of TPU char was investigated by scanning electron microscopy to analyze the flame-retardant mechanism. The tensile strength of TPU containing 1.35 wt% PEPE was 39.2 MPa, which was almost twice as much as neat TPU, showed a dramatic decrease in the peak heat release rate and total heat release, and declined by 46.2% and 24.5%, respectively. After the flame-retardant TPU burned, a cross-linked network foaming char structure was formed. The results showed that PEPE improved the mechanical properties of TPU and conferred good stability that promoted the formation of charcoal and reduced heat release during the combustion of TPU.https://www.mdpi.com/2073-4360/13/15/2388thermoplastic polyurethane elastomeraromatic acetyleneflame-retardantstrength |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Meina Xie Daikun Jia Jin Hu Jiyu He Xiangmei Li Rongjie Yang |
spellingShingle |
Meina Xie Daikun Jia Jin Hu Jiyu He Xiangmei Li Rongjie Yang Fabrication of Enhanced Mechanical Properties and Intrinsic Flame-Retardant Polyurethane Elastomer Containing 4-(Phenylethynyl) Di(Ethylene Glycol) Phthalate Polymers thermoplastic polyurethane elastomer aromatic acetylene flame-retardant strength |
author_facet |
Meina Xie Daikun Jia Jin Hu Jiyu He Xiangmei Li Rongjie Yang |
author_sort |
Meina Xie |
title |
Fabrication of Enhanced Mechanical Properties and Intrinsic Flame-Retardant Polyurethane Elastomer Containing 4-(Phenylethynyl) Di(Ethylene Glycol) Phthalate |
title_short |
Fabrication of Enhanced Mechanical Properties and Intrinsic Flame-Retardant Polyurethane Elastomer Containing 4-(Phenylethynyl) Di(Ethylene Glycol) Phthalate |
title_full |
Fabrication of Enhanced Mechanical Properties and Intrinsic Flame-Retardant Polyurethane Elastomer Containing 4-(Phenylethynyl) Di(Ethylene Glycol) Phthalate |
title_fullStr |
Fabrication of Enhanced Mechanical Properties and Intrinsic Flame-Retardant Polyurethane Elastomer Containing 4-(Phenylethynyl) Di(Ethylene Glycol) Phthalate |
title_full_unstemmed |
Fabrication of Enhanced Mechanical Properties and Intrinsic Flame-Retardant Polyurethane Elastomer Containing 4-(Phenylethynyl) Di(Ethylene Glycol) Phthalate |
title_sort |
fabrication of enhanced mechanical properties and intrinsic flame-retardant polyurethane elastomer containing 4-(phenylethynyl) di(ethylene glycol) phthalate |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2021-07-01 |
description |
In this study, the aromatic acetylene compound 4-(phenylethynyl) di(ethylene glycol) phthalate (PEPE) was used as a chain extender, partially replacing 1,4-butanediol. To synthesize an intrinsic flame-retardant thermoplastic polyurethane elastomer (TPU) with an aromatic acetylene structure, PEPE was synthesized by a two-step polymerization. The flame retardancy, thermal stability, and mechanical properties of TPU were studied. The microstructure of TPU char was investigated by scanning electron microscopy to analyze the flame-retardant mechanism. The tensile strength of TPU containing 1.35 wt% PEPE was 39.2 MPa, which was almost twice as much as neat TPU, showed a dramatic decrease in the peak heat release rate and total heat release, and declined by 46.2% and 24.5%, respectively. After the flame-retardant TPU burned, a cross-linked network foaming char structure was formed. The results showed that PEPE improved the mechanical properties of TPU and conferred good stability that promoted the formation of charcoal and reduced heat release during the combustion of TPU. |
topic |
thermoplastic polyurethane elastomer aromatic acetylene flame-retardant strength |
url |
https://www.mdpi.com/2073-4360/13/15/2388 |
work_keys_str_mv |
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