MAGNETIC-FIELD AND TEMPERATURE EFFECTS ON THE SOLID-STATE PROTON SPIN-LATTICE RELAXATION-TIME MEASUREMENTS OF WOOD AND PULPS

被引：6

作者：

ARGYROPOULOS, DS ^{[1
]}

MORIN, FG ^{[1
]}

LAPCIK, L ^{[1
]}

机构：

[1] PULP & PAPER RES CTR,MONTREAL,PQ,CANADA

来源：

HOLZFORSCHUNG | 1995年 / 49卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

MACROMOLECULES; WOOD STRUCTURE; LATTICES; RELAXATION; PICEA MARIANA; CARBOHYDRATES; LIGNINS; SULFONATION; SPECTROSCOPY; NUCLEAR MAGNETIC RESONANCE (NMR); TEMPERATURE;

D O I：

10.1515/hfsg.1995.49.2.115

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

The proton spin-lattice relaxation times (T-1) for a series of progressively sulphonated black spruce pulps were measured at two static magnetic fields and al a variety of temperatures. These determinations showed that the frequency of the anisotropic molecular motions of carbohydrates and lignin, responsible for spin relaxation on wood and pulps, is of the order of 10(-9)s. For cross-polarization measurements with a 300 MHz solid state NMR spectrometer, room temperature seems to be close to the T-1 versus correlation time minimum.

引用

页码：115 / 118

页数：4

共 12 条

[1]

ARGYROPOULOS DS, 1995, WOOD SCI, V1, P29

[2]

GERASIMOWICZ WV, 1984, MACROMOLECULES, V17, P597

[3]

GRAVITIS J, 1991, J PULP PAP SCI, V17, pJ119

[4]

MCBRIERTY VJ, 1981, MACROMOL REV, V16, P295