Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Doetze Jakob Sikkema"'
Autor:
Doetze Jakob Sikkema, Ger Jan Kemperman, Ron M. Versteegen, Jos B.M. Rewinkel, Menno Koeman, Ben Boere, Ferry Brands, Maarten J. Pouderoijen, Henk M. Janssen
Publikováno v:
Journal of Power Sources, 379, 234-239. Elsevier
2,6-di (3-pyridyl)phenol and the title polymer are synthesized at 1 kg scale. Polymer is processed and crosslinked without the introduction of non-aromatic moieties after shaping into membranes. Attractive proton conduction, at high temperature (140
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:
Doetze Jakob Sikkema
Publikováno v:
Journal of Applied Polymer Science. 83:484-488
A brief overview of a century of manmade fiber development (particularly technical, i.e., strong and high E-modulus, fibers), emphasizing the last quarter century where the work increasingly grew in the direction of rational design of new structures,
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
Autor:
Doetze Jakob Sikkema
Publikováno v:
Polymer. 39:5981-5986
A rigid rod polymer with strong hydrogen bonds between the polymer chains was found in polypyridobisimidazole based on 2,3,5,6-tetraaminopyridine and 2,5-dihydroxyterephthalic acid (D. J. Sikkema and V. Lishinsky, WO 94/25506). The strong interchain
Autor:
Doetze Jakob Sikkema, John Reichwein
Publikováno v:
Macromolecular Chemistry and Physics. 195:273-278
With the aim of preparing a new rigid rod type polymer, we worked out a synthesis of the title compound: 1,4-bis(chloromethyl)benzene was reacted with KCN, and the product was formylated with ethyl formate; exchange of enol by enamine function by tre
Publikováno v:
Synthetic Communications. 23:2605-2609
Malononitrile is condensed with triethyl orthoformate in the presence of pyridine; the mixture is acidified with HCI gas and after addition of further pyridime. HCI diazotised to form 2,6-dichloro-3,5-dicyanopyridine in a convenient, high yield proce
Publikováno v:
Journal of Applied Polymer Science. 48:1945-1951
A new amorphous heat-resistant aromatic polyamide was prepared by solution polymer-ization in N-methylpyrrolidone, (NMP) from equimolar amounts of 4,4′-methylenedianiline, p-phenylenediamine, isophthaloyl chloride, and terephthaloyl chloride. After
Publikováno v:
ChemInform. 25