In situ synthesis of flame retardant organic–inorganic hybrids by a molten blending method based on thermoplastic polyurethane elastomer and polybutyl titanate

RSC Advances ◽  
2016 ◽  
Vol 6 (95) ◽  
pp. 92276-92284 ◽  
Author(s):  
Xilei Chen ◽  
Wenduo Wang ◽  
Chuanmei Jiao
Keyword(s):  
Flame Retardant ◽  
Thermoplastic Polyurethane ◽  
Synthesis Method ◽  
In Situ Synthesis ◽  
Polyurethane Elastomer ◽  
Inorganic Hybrid ◽  
Blending Method ◽  
Thermoplastic Polyurethane Elastomer

A novel type of organic–inorganic hybrid prepared using an in situ synthesis method by molten blending polybutyl titanate (BTP) and thermoplastic polyurethane elastomer (TPU) is reported.

Negative Permittivity Behavior in Silver/Polyaniline Metacomposites Induced by the Low-Frequency Plasmonic Oscillation

2021 ◽  
Author(s):  
Jiahong Tian ◽  
Runhua Fan ◽  
Zongxiang Wang ◽  
Jiahao Xin ◽  
Zhongyang Wang
Keyword(s):  
Synthesis Method ◽  
Low Frequency ◽  
In Situ Synthesis ◽  
Negative Permittivity ◽  
Free Electrons ◽  
Dominant Effect ◽  
Equivalent Circuit Analysis ◽  
Inductive Character ◽  
Percolation Network

Abstract Silver/polyaniline (Ag/PANI) composites were prepared by an in-situ synthesis method. Interestingly, the permittivity changed from positive to negative along with the formation of percolation network. The plasma oscillations of free electrons from the network made a dominant effect on the negative permittivity behavior. Further investigation based on equivalent circuit analysis revealed that the composites with negative permittivity presented inductive character. The epsilon-negative composites can be applied to electromagnetic shielding, absorbing and attenuation.

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