Add to ORKGPulse NMR methods have been employed to investigate the phase state and the process of phase separation in segmented PUs based on 1,4-butanediol and 4,4′-diphenylmethane diisocyanate with crystallizable (polybutylene glycol adipate) and non-crystallizable as part of PU (polybutylene ethylene glycol adipate) polyesters. For both samples the same Tg of flexible blocks (-20°C) and temperature of the disappearance of the microphase of the rigid blocks (110°C) are observed. The segregation process was found to have two stages with acceleration as the temperature rises in a certain interval. The crystallization processes of the flexible blocks were found to influence the rate of segregation of the rigid blocks. © 1990
Polyurethanes (PUs) have been widely used in several trade sections. Thereby, large amounts of waste...
A correlation study on the characterization of polyethylene was carried out between DSC and solid-st...
NMR studies have been made on the nonionic and ionic poly(N-isopropylacrylamide) gels near their pha...
Pulse NMR methods have been employed to investigate the phase state and the process of phase separat...
The effect of the content of rigid blocks on the phase state and structure of rigid domains in segme...
Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based o...
The two series of the segmented polyurethanes, namely, 2,4-toluylendiamine, 2,4-toluylendiisocyanate...
A new technique based on the Goldman-Shen pulse sequence with varying preparation interval is propos...
A set of aromatic-oxyaliphatic polyurethanes (PUs) with different mass fractions of components also ...
Molecular mobility in polyblock regular alternating block copolymers has been investigated by pulsed...
Pulsed deuteron NMR results are reported for a series of segmented model polyurethanes with monodisp...
The goal of this work is to investigate the molecular dynamics as well as the composition and the st...
Segmented polyurethanes are block copolymers of the (AB)n type characterized by a microphase-separat...
There are several reports of crystallization studies [1-3] by classical methods, e.g. dilatometry et...
Polyurethanes (PUs) have been widely used in several trade sections. Thereby, large amounts of waste...
A correlation study on the characterization of polyethylene was carried out between DSC and solid-st...
NMR studies have been made on the nonionic and ionic poly(N-isopropylacrylamide) gels near their pha...
Pulse NMR methods have been employed to investigate the phase state and the process of phase separat...
The effect of the content of rigid blocks on the phase state and structure of rigid domains in segme...
Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based o...
The two series of the segmented polyurethanes, namely, 2,4-toluylendiamine, 2,4-toluylendiisocyanate...
A new technique based on the Goldman-Shen pulse sequence with varying preparation interval is propos...
A set of aromatic-oxyaliphatic polyurethanes (PUs) with different mass fractions of components also ...
Molecular mobility in polyblock regular alternating block copolymers has been investigated by pulsed...
Pulsed deuteron NMR results are reported for a series of segmented model polyurethanes with monodisp...
The goal of this work is to investigate the molecular dynamics as well as the composition and the st...
Segmented polyurethanes are block copolymers of the (AB)n type characterized by a microphase-separat...
There are several reports of crystallization studies [1-3] by classical methods, e.g. dilatometry et...
Polyurethanes (PUs) have been widely used in several trade sections. Thereby, large amounts of waste...
A correlation study on the characterization of polyethylene was carried out between DSC and solid-st...
NMR studies have been made on the nonionic and ionic poly(N-isopropylacrylamide) gels near their pha...
