Zobrazeno 1 - 10
of 37
pro vyhledávání: '"M. G. Northolt"'
Autor:
J. H. Palm, M. G. Northolt
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 85:143-146
The absolute configuration of (+)-3-bromocamphor has been determined by X-ray single crystal diffraction, Br acting as anomalous scatterer for MoKa radiation. The absolute configuration thus determined is in agreement with that proposed by Fredga and
Autor:
J. J. van Aartsen, M. G. Northolt
Publikováno v:
Journal of Polymer Science: Polymer Symposia. 58:283-296
On the basis of a single-phase structural model a theory has been developed, which yields a relation between the fiber compliance and the chain axis distribution. It is shown that this relation, viz. Is quantitatively fulfilled for poly(p-phenylene t
Autor:
M. G. Northolt
Publikováno v:
Journal of Polymer Science Part C: Polymer Symposia. 38:205-211
The deformation behavior of initially amorphous films of nylons 11, 66, and 12 has been studied at drawing temperatures above and below the glass transition temperature. Evidence has been found that the glass transition temperature in polyamides is c
Publikováno v:
MRS Bulletin. 28:579-584
High-performance fibers, used in fabric applications ranging from bulletproof vests to trampolines, must have a sufficient number of chemical and physical bonds for transferring the stress along the fiber. To limit their deformation, the fibers shoul
PIPD, a new high-modulus and high-strength polymer fibre with exceptional fire protection properties
Publikováno v:
Fire and Materials. 26:169-172
The development of the new high-modulus and high-strength fibre M5, made of poly-2,6-diimidazo[4,5-b:4',5'-e]pyridinylene-1,4(2,5-dihydroxy)phenylene or PIPD, has resulted in an organic polymer fibre with exceptional fire protection properties when c
Autor:
J.J.M. Baltussen, M. G. Northolt
Publikováno v:
Journal of Applied Polymer Science. 83:508-538
An outline of the continuous chain model for the description of the tensile and compressive deformation of polymer fibers below the glass transition temperature is presented. The basic mechanism is the contraction of the chain orientation distributio
Publikováno v:
Polymer. 42:8249-8264
The structure and the mechanical properties of a newly developed highmodulus/high strength cellulose fibre spun from an anisotropic solution in phosphoric acid are discussed and compared with those of existing regenerated cellulose fibres. The crysta
Autor:
J.J.M. Baltussen, M. G. Northolt
Publikováno v:
Polymer. 40:6113-6124
The stress vs. strain curve with yield and the sonic modulus vs. strain curve of fibres of linear polymers below the glass transition temperature are modelled by the continuous chain model in combination with a simple yield model. It is supposed that
Publikováno v:
Polymer. 39:5999-6005
The polymer poly{2,6-diimidazo[4,5-b:4′,5′-e]pyridinylene-1,4(2,5-dihydroxy)phenylene} (PIPD) is spun from a liquid crystalline solution in polyphosphoric acid. The as-spun fibre is a crystal hydrate, which transforms into a bidirectional hydroge
Publikováno v:
Journal of Rheology. 41:549-573
Fibers of linear polymers below the glass transition show a strong nonlinear deformation behavior even at small strains. The elastic modulus is a fast increasing function of the strain. A new model for the description of the deformation of these fibe