Study of nylon 6 and poly(propylene oxide) blends by thermal measurements and carbon‐13 NMR high resolution solid‐state

Abstract

Instituto de MacrornoIi.culas/UFRJ, RJ, Brazil, CP 68525; 'DTQ/IQ/UFRRJ, RJ, Brazil SYNOPSIS Samples of Nylon G/poly(propylene oxide), with poly(propy1ene oxide) (PPO) content varying up to 35%, have been examined using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and nuclear magnetic resonance (NMR) carbon-13 at solidstate. Carbon-13 spectra were measured by cross-polarization (CP), magic angle spinning (MAS), and high-power hydrogen decoupling (HPHD). The variation contact time experiment and MAS technique were also determined. The data are discussed in terms of compatibility and plasticization of the samples. 0

High‐resolution 13C–nuclear magnetic resonance study of heterogeneous amorphous polymers

“…4 MHz for 13 C. A 90°pulse and a delay of 20 s were used to acquire the quantitative spectra. The 13 C-NMR spectra were obtained on an INOVA 300 spectrometer operating at 75.4 MHz for 13 C. All experiments were performed at probe ambient temperature using highpower proton decoupling.…”

“…Solid-state NMR spectroscopy also offers a great variety of relaxation times, which are very important and informative on molec-ular mobility studies in different time scales. [1][2][3][4][5][6][7][8][9][10][11][12] As the spin-lattice relaxation process is generally dominant in the solid state, the proton spin-lattice parameter can provide direct information on molecular motion. Proton spin-lattice relaxation can be measured in the laboratory frame with a constant designated as T 1 and, in the rotating frame, with a constant characterized by T 1 .…”

13C solid-state NMR analysis of the DGEBA/TETA epoxy system

“…These values can be correlated with the mobility and interaction of molecular groups or segments. [17][18][19][20][21][22] For samples with 7-11 phr, rich in the epoxy monomer, the T 1 H values indicate that the molecular chains present a good interaction. This behavior could come from the total reaction of the reactive groups in the amine molecule tightening together the epoxy molecules, and a rigid macromolecular structure is developed.…”

Preparation and solid‐state nuclear magnetic resonance characterization a styrene/butadiene/acrylonitrile (ABS)/poly(vinyl chloride) (PVC)/gypsum ternary system

“…Solid state NMR also has a wide variety of specialized pulse sequences that allow one to obtain subspectra of components in different domains. [1][2][3][4][5][6][7] The magic-angle spin (MAS) 13 C NMR technique provides information on different domains of a sample by varying the acquisition conditions to detect only one region; for example, the mobile region. [7][8][9][10][11][12] This technique generates information on sample molecular mobility.…”

“…1,[7][8][9][10][11][12] Solid-state 13 C NMR offers a great variety of relaxation times that provide information on molecular mobility in different time scales. [1][2][3][4][5][6][7][8][9][10][11][12] The spin-lattice relaxation process is generally dominant in the solid state, and the proton spin-lattice parameter can give direct information about molecular motion. The proton spin-lattice relaxation time can be measured in the laboratory frame with a constant (denoted T 1 ) and in the rotating frame with a constant (denoted T 1 ).…”