Glass transition of soft segments in phase-mixed poly(urethane urea) elastomers by time-domain 1H and 13C solid-state NMR

Polymer ◽  
2016 ◽  
Vol 100 ◽  
pp. 149-157 ◽  
Author(s):  
Weiguo Hu ◽  
Nitin V. Patil ◽  
Alex J. Hsieh
Keyword(s):  
Glass Transition ◽  
Solid State ◽  
Time Domain ◽  
Solid State Nmr ◽  
Soft Segments

Glass transition dynamics in a compatible blend by two-dimensional solid-state NMR

1992 ◽  
Vol 25 (12) ◽  
pp. 3031-3038 ◽  
Author(s):  
Y. H. Chin ◽  
C. Zhang ◽  
P. Wang ◽  
P. T. Inglefield ◽  
A. A. Jones ◽  
...  
Keyword(s):  
Glass Transition ◽  
Solid State ◽  
Solid State Nmr ◽  
Two Dimensional ◽  
Transition Dynamics

scholarly journals Interplay of Structural Factors in Formation of Microphase-Separated or Microphase-Mixed Structures of Polyurethanes Revealed by Solid-State NMR and Dielectric Spectroscopy

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1967
Author(s):  
Stepan A. Ostanin ◽  
Maxim V. Mokeev ◽  
Dmitry V. Pikhurov ◽  
Aleksandr S. Sakhatskii ◽  
Vjacheslav V. Zuev
Keyword(s):  
Solid State ◽  
Dielectric Spectroscopy ◽  
Solid State Nmr ◽  
Solubility Parameters ◽  
Structural Factors ◽  
Soft Segments ◽  
Mass Fractions ◽  
Nmr Techniques ◽  
The Common ◽  
Good Agreement

A set of aromatic-oxyaliphatic polyurethanes (PUs) with different mass fractions of components also containing fluorinated fragments was synthesized and studied using various solid-state NMR techniques and dielectric spectroscopy. In contrast to the common model suggested by Cooper and Tobolsky in 1966, the rigid domains of microphase separated PUs are formed, not only by units containing urethane bonds, but also by oxyethylene fragments that form a common rigid phase. The urethane bonds and oxyethylene fragments are incorporated into both rigid and soft phases. Good agreement with the Cooper and Tobolsky model is observed only when solubility parameters are significantly different for the hard and soft segments, such as hydrocarbon aromatics and perfluoroaliphatic blocks.

scholarly journals Probing the two-stage transition upon crossing the glass transition of polystyrene by solid-state NMR

2016 ◽  
Vol 34 (4) ◽  
pp. 446-456 ◽  
Author(s):  
Yong-jin Peng ◽  
Chen-ting Cai ◽  
Rong-chun Zhang ◽  
Tie-hong Chen ◽  
Ping-chuan Sun ◽  
...  
Keyword(s):  
Glass Transition ◽  
Solid State ◽  
Solid State Nmr ◽  
Two Stage ◽  
Stage Transition

A useful tool for the elaboration of new solid-state NMR experiments: PULSAR

1995 ◽  
Vol 92 ◽  
pp. 1939-1942 ◽  
Author(s):  
JP Amoureux ◽  
C Fernandez ◽  
Y Dumazy
Keyword(s):  
Solid State ◽  
Solid State Nmr

Quantitative analysis by 13C solid-state NMR of eumelanins

1994 ◽  
Vol 91 ◽  
pp. 881-887 ◽  
Author(s):  
M Hervé ◽  
J Hirschinger ◽  
P Granger ◽  
P Gilard ◽  
N Goetz
Keyword(s):  
Quantitative Analysis ◽  
Solid State ◽  
Solid State Nmr
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