Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based on poly(diethylene glycol adipate), 2,4-tolylene diamine, and 2,4-toluene diisocyanate. It was concluded that NMR relaxation is determined by physical interactions between rigid blocks and also between rigid and flexible blocks. The dependence of the degree of segregation on the molecular weights of rigid and flexible blocks was determined. A quite high degree of segregation in the investigated systems and the related manifestations of individual features of flexible blocks enabled to follow the dynamics of the molecular chain with fixed end and study variation of the glass transition temperature and the activation energy of the segmental moti...
The effect of the content of rigid blocks on the phase state and structure of rigid domains in segme...
Abstract. In this study, we investigated molecular mobility of a soft segment in the poly(oxypropyle...
Pulse NMR methods have been employed to investigate the phase state and the process of phase separat...
Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based o...
Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based o...
Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based o...
Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based o...
Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based o...
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...
Pulse NMR methods have been employed to investigate the phase state and the process of phase separat...
Pulse NMR methods have been employed to investigate the phase state and the process of phase separat...
Pulse NMR methods have been employed to investigate the phase state and the process of phase separat...
Abstract. In this study, we investigated molecular mobility of a soft segment in the poly(oxypropyle...
The effect of the content of rigid blocks on the phase state and structure of rigid domains in segme...
The effect of the content of rigid blocks on the phase state and structure of rigid domains in segme...
Abstract. In this study, we investigated molecular mobility of a soft segment in the poly(oxypropyle...
Pulse NMR methods have been employed to investigate the phase state and the process of phase separat...
Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based o...
Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based o...
Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based o...
Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based o...
Spin-lattice and spin-spin NMR relaxation was studied in a series of segmented polyurethanes based o...
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...
Pulse NMR methods have been employed to investigate the phase state and the process of phase separat...
Pulse NMR methods have been employed to investigate the phase state and the process of phase separat...
Pulse NMR methods have been employed to investigate the phase state and the process of phase separat...
Abstract. In this study, we investigated molecular mobility of a soft segment in the poly(oxypropyle...
The effect of the content of rigid blocks on the phase state and structure of rigid domains in segme...
The effect of the content of rigid blocks on the phase state and structure of rigid domains in segme...
Abstract. In this study, we investigated molecular mobility of a soft segment in the poly(oxypropyle...
Pulse NMR methods have been employed to investigate the phase state and the process of phase separat...