Infrared Study of Hydrogen Bonding between Polymers and Methanol: Polypropylene Oxide and Polypropylene Glycol

1966 ◽  
Vol 44 (2) ◽  
pp. 737-740 ◽  
Author(s):  
J. F. Heil ◽  
J. M. Prausnitz
Keyword(s):  
Hydrogen Bonding ◽  
Polypropylene Glycol ◽  
Infrared Study ◽  
Polypropylene Oxide

Stabilisation of hydrogen bonding in polypropylene glycol at EHL contact region

2010 ◽  
Vol 22 (9) ◽  
pp. 367-376 ◽  
Author(s):  
Koji Takiwatari ◽  
Hidetaka Nanao ◽  
Eiichi Suzuki ◽  
Shigeyuki Mori
Keyword(s):  
Hydrogen Bonding ◽  
Contact Region ◽  
Polypropylene Glycol ◽  
Ehl Contact

An infrared study of hydrogen-bonding between phenols and sulphoxides

Tetrahedron ◽  
1982 ◽  
Vol 38 (9) ◽  
pp. 1213-1216 ◽  
Author(s):  
Carlos A.L. Filgueiras ◽  
Olguita G.F. Rocha
Keyword(s):  
Hydrogen Bonding ◽  
Infrared Study

Study on the Reaction of TDI and PPG with Organo-Tin Mixed Catalyst

2011 ◽  
Vol 418-420 ◽  
pp. 13-17
Author(s):  
Su Ran Liao ◽  
Yuan Wei ◽  
Yu Qi Zhang ◽  
Meng Zhang ◽  
Gao Fei Feng
Keyword(s):  
Molecular Weight ◽  
Hydrogen Bonding ◽  
Average Molecular Weight ◽  
Polypropylene Glycol ◽  
Number Average Molecular Weight ◽  
Mixed Catalyst ◽  
Back Titration ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Polymerization Conditions

The study of polyurethanes are of continuing interest due to their excellent physical properties. In this study, the reaction kinetics and polymerization conditions in two-step process of toluene diisocyante (TDI) and polypropylene glycol (PPG) with organo-tin mixed catalyst were investigated by di-n-butylamine back-titration. It was showed that the reaction obeyed the second-order equation of step-growth polymerization, the rate constants of TDI and PPG reaction at 50, 60 and 70°C were 0.0922, 0.3373 and 0.5828 kg•mol-1•min-1，respectively. The activation energy obtained from the result was 71.63 kJ•mol-1. The number average molecular weight (Mn) and molecular-weight distribution (Mw/Mn) of the polyurethane were 45175 and 1.53, respectively, and the content of hydrogen bonding in the N-H group from Fourier transform infrared spectrum (FTIR) was 80.75%, which manifested that the large amount of N-H were present in hydrogen bonding.

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