Transparent, flame‐retarded, self‐healable, mechanically strong polyurethane elastomers: Enabled by the synthesis of phosphorus/nitrogen‐containing oxime chain‐extender

2021 ◽  
pp. 51598
Author(s):  
Gao‐Fei Pan ◽  
Zhe Wang ◽  
De‐Qing Kong ◽  
Tang‐Wen Sun ◽  
Hui Zhai ◽  
...  
Keyword(s):  
Chain Extender ◽  
Polyurethane Elastomers ◽  
Flame Retarded

scholarly journals Thermal analysis of polyurethane elastomers matrix with different chain extender contents for thermal conductive application

2019 ◽  
Vol 138 (2) ◽  
pp. 1003-1010 ◽  
Author(s):  
Patcharapon Somdee ◽  
Tímea Lassú-Kuknyó ◽  
Csaba Kónya ◽  
Tamás Szabó ◽  
Kálmán Marossy
Keyword(s):  
Thermal Analysis ◽  
Chain Extender ◽  
Polyurethane Elastomers

scholarly journals Thermal stability of segmented polyurethane elastomers reinforced by clay particles

2009 ◽  
Vol 63 (6) ◽  
pp. 621-628 ◽  
Author(s):  
Jelena Pavlicevic ◽  
Jaroslava Budinski-Simendic ◽  
Mészáros Szécsényi ◽  
Nada Lazic ◽  
Milena Spirkova ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Properties ◽  
Chain Extender ◽  
Hexamethylene Diisocyanate ◽  
Scanning Calorimetry ◽  
Modulated Differential Scanning Calorimetry ◽  
Polyurethane Elastomers ◽  
Oh Groups ◽  
Clay Nanoparticles ◽  
Thermal Stability Of

The aim of this work was to determine the influence of clay nanoparticles on thermal properties of segmented polyurethanes based on hexamethylene- diisocyanate, aliphatic polycarbonate diol and 1,4-butanediol as chain extender. The organically modified particles of montmorillonite and bentonite were used as reinforcing fillers. The structure of elastomeric materials was varied either by diol type or chain extender content. The ratio of OH groups from diol and chain extender (R) was either 1 or 10. Thermal properties of prepared materials were determined using modulated differential scanning calorimetry (MDSC). Thermal stability of obtained elastomers has been studied by simultaneously thermogravimetry coupled with DSC. The glass transition temperature, Tg, of soft segments for all investigated samples was about -33?C. On the basis of DTG results, it was concluded that obtained materials were very stable up to 300?C.

scholarly journals Tuning chain extender structure to prepare high-performance thermoplastic polyurethane elastomers

RSC Advances ◽  
2018 ◽  
Vol 8 (37) ◽  
pp. 20701-20711 ◽  
Author(s):  
Wei Juan Xu ◽  
Jian Jun Wang ◽  
Shi Yu Zhang ◽  
Jun Sun ◽  
Chuan Xiang Qin ◽  
...  
Keyword(s):  
High Performance ◽  
Thermoplastic Polyurethane ◽  
Chain Extender ◽  
Polyurethane Elastomers ◽  
Thermoplastic Polyurethane Elastomers ◽  
Chain Extenders ◽  
Thermo Stability

Ester-containing ferrocenyl diols are introduced as chain extenders to tune the polyurethane superstructure to optimize thermo-stability and elasticity simultaneously.

Investigating the Properties and Structure of Polyurethane Elastomers with Monoethylene Glycol Chain Extender

2020 ◽  
Vol 986 ◽  
pp. 18-23
Author(s):  
Patcharapon Somdee ◽  
Timea Lassu-Kuknyo ◽  
Csaba Konya ◽  
Tamás Szabó ◽  
Kálmán Marossy
Keyword(s):  
Hard Segment ◽  
Chain Extender ◽  
Polypropylene Glycol ◽  
Polyurethane Elastomers ◽  
Elongation At Break ◽  
Peak Intensity ◽  
Hard Segment Content ◽  
Polymeric Chains ◽  
Monoethylene Glycol ◽  
Hardness Values

The effect of monoethylene glycol (mEG) acting as chain extender in polypropylene glycol (PPG-4000) and 4,4ʹ-diphenylmethane diisocyanate (MDI) reaction was investigated. Polyurethane elastomers (PUR) were changed from flexible to rigid materials by varying the mEG content. Results show that Shore A and D hardness values trend to increase with increasing mEG content. It appears that increasing the chain extender content increases the hard segment content in the polyurethane structure. Moreover, increasing the mEG content increases Young’s modulus and the tensile strength of PUR, while elongation at break decreases. The chemical structure of the hard segment of PUR was characterized by Infrared (IR) spectroscopy. IR spectra exhibited the bands typical for PUR consisting of –NH, CH2– and C=O groups. The spectra reveal a few interactions between the polymeric chains that appear to be responsible for the shift of transmittance peak and decrease of some peak intensity. This may be due to the hard segment aggregating more to form domains in the PUR when mEG content was increased.

Study on Mechanical Properties of Polyurethane Elastomers for Drum Scraper

2011 ◽  
Vol 284-286 ◽  
pp. 2384-2387
Author(s):  
Jin Cui Zhang ◽  
Xi Jun Liu ◽  
Tie Ning Ma
Keyword(s):  
Mechanical Properties ◽  
Chain Extender ◽  
Glycol Ether ◽  
Toluene Diisocyanate ◽  
Chain Extension ◽  
Molar Ratio ◽  
Casting Method ◽  
Polyurethane Elastomers ◽  
Application Requirements

Polyurethane elastomers (PUE) were prepared by casting method using the prepolymer and the chain extender. In here, the prepolymer synthesized by using poly(tetramethylene glycol ether) (PTMG) and toluene diisocyanate (TDI), the chain extender was a mixture of 3,5-dimetylthio toluene diamine (E-300) and triethanolamine. The effects of the NCO concentration in prepolymer, the molar ratio of E-300/triethanolamine, and the chain extension coefficient of NCO/NH2 on the mechanical properties of the prepared PUE were studied. The results showed that the prepared PUE possesses excellent mechanical properties which can meet the drum scraper’s application requirements when the NCO concentration in prepolymer was 5.06% and the molar ratio of composite chain extender was 0.92/0.08.

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