Zobrazeno 1 - 10
of 59
pro vyhledávání: '"J. J. Point"'
Autor:
Cl. Coutelier, J.-J. Point
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 95:605-608
The orientation of pC6H4Cl2 in the [(pC6H4Cl2)3 (CH2CH2O)10]n crystalline intercalate previously studied by X-Ray diffraction and FTIR spectroscopy, is obtained by measurement of birefringence of fibres of this compound.
Autor:
J. J. Point
Publikováno v:
Journal of Polymer Science: Polymer Symposia. 59:87-108
This paper discusses the morphology of individual lamellar crystals of semicrystalline linear high polymers in the bulk or oriented states. We discuss the simple two-phase model, the model where the folds are level, and intermediate models. We also d
Publikováno v:
Journal of Polymer Science Part C: Polymer Symposia. 38:135-165
Single-textured samples of high pressure polyethylene were prepared by rolling. The anisotropy of the variations of macroscopic dimensions of these samples produced by thermal expansion or by swelling with solvent allows us to test the classical mode
Autor:
J.-J. Point
Publikováno v:
Polymer. 47:3186-3196
The transmittivity [Point JJ. Bull Clas Sci Acad Roy Belg 1953;39:455; 1955;41:982. [1]] of light intensity through spherulitic films of poly(ethylene adipate) (PEA) is not uniform. These films may actually be used as multiple diffraction gratings. T
Autor:
P. Damman, J. J. Point
Publikováno v:
Macromolecules. 28:2050-2053
In previous papers, the structure and the spherulitic morphology of the a crystal form of the poly(ethylene oxide)-p-nitrophenol molecular complex were described. The observation of another spherulite morphology (β) of the same compound was now repo
Autor:
J. J. Point, Pascal Damman
Publikováno v:
Polymer International. 36:117-125
A crystalline complex of poly(ethylene oxide) (PEO) and p-nitrophenol (PNP) was studied by differential scanning calorimetry, X-ray diffraction, and FTIR spectroscopy. The phase diagram of this system is characterized by a peritectic reaction, and re
Autor:
J.-J. Point, J.J. Janimak
Publikováno v:
Journal of Crystal Growth. 131:501-517
The currently accepted idea that the nucleation controlled growth of polymer crystals and spherulites proceeds in different regimes is evaluated. We start from the concepts of mono- and polynucleation regimes of nucleation controlled growth of 2D cry
Autor:
P. Damman, J. J. Point
Publikováno v:
Macromolecules. 26:1722-1728
The crystal structure of the poly(ethylene oxide) (PEO)-p-nitrophenol (pnp) complex was previously determined by X-ray diffraction and polarized FTIR. When the molecular weight of the polymeric component is either 6000 or 36 000, melt-grown crystals
Publikováno v:
Macromolecules. 25:4768-4778
DSC that the poly(ethyleneoxide)-resorcinol molecular complex crystallizes into two allotropic forms, denoted here as α and β forms, respectively. The phase diagram of the PEO-resorcinol system is obtained. The α form of the molecular complex crys
Autor:
Pascal Damman, J. J. Point
Publikováno v:
Macromolecules. 25:1184-1188
X-ray data of the crystalline complex indicate a triclinic unit cell (a = 1.172 nm; b= 0.555 nm; c= 1.557 nm; α= 90.7°; β= 87.1°; γ= 104.0°). The unit cell contains six poly(ethylene oxide) (PEO) monomeric units and four p-nitrophenol molecules