Influence of TiO2 particles and APP on combustion behavior and mechanical properties of flame-retardant thermoplastic polyurethane

2017 ◽  
Vol 132 (1) ◽  
pp. 251-261 ◽  
Author(s):  
Xilei Chen ◽  
Yong Wang ◽  
Chuanmei Jiao
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Thermoplastic Polyurethane ◽  
Combustion Behavior ◽  
Tio2 Particles

scholarly journals Fabrication of Enhanced Mechanical Properties and Intrinsic Flame-Retardant Polyurethane Elastomer Containing 4-(Phenylethynyl) Di(Ethylene Glycol) Phthalate

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2388
Author(s):  
Meina Xie ◽  
Daikun Jia ◽  
Jin Hu ◽  
Jiyu He ◽  
Xiangmei Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ethylene Glycol ◽  
Heat Release ◽  
Flame Retardant ◽  
Thermoplastic Polyurethane ◽  
Polyurethane Elastomer ◽  
Dramatic Decrease ◽  
Acetylene Compound ◽  
Peak Heat Release Rate ◽  
A Chain

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.

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