Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Don D. Davis"'
Publikováno v:
Macromolecules. 29:4952-4957
We have conducted a detailed electron-microscopic investigation of the structure and morphology of α-hexathienyl (α-6T), a hexameric homologue of polythiophene that shows great promise as a thin-film-transistor material. In ordinary films for devic
Publikováno v:
Macromolecules. 26:2716-2723
Building upon the previous results on silicon-based homopolymers, the authors have now synthesized and characterized copolymers of these novel materials. The copolymers poly(di-n-butylsilylene-co-di-n- pentylsilylene) (PB-co-PS) and poly(di-n-pentyls
Publikováno v:
ChemInform. 23
The polysilylenes exhibit complex solid-state structures and electronic properties. In this report the solid-state conformational structures of symmetrically substituted poly(di-n-alkylsilylenes) are described. Comparisons between the different struc
Publikováno v:
Journal of Inorganic and Organometallic Polymers. 2:47-57
The polysilylenes exhibit complex solid-state structures and electronic properties. In this report the solid-state conformational structures of symmetrically substituted poly(di-n-alkylsilylenes) are described. Comparisons between the different struc
Publikováno v:
Macromolecules. 25:1752-1758
PEEK crystallized at temperatures between 300 and 320°C was studied. No support was found for suggested changes in crystal structure, growth face, growth direction or gross spherulitic morphology. In addition to narrow, fibrous lamellae, evidence wa
Publikováno v:
Macromolecules. 25:1759-1765
Although poly(aryl ether ether ketone) (PEEK) and poly(ether imide) (PEI) blends are compatible in the melt, phase separation occurs during crystallization of the PEEK component. At high temperatures (∼320°C) compact PEEK spherulites are observed
Publikováno v:
Polymer. 32:3086-3090
We have obtained and studied the first single crystals of the important silicon-backbone polymer, poly(dimethyl silylene) (PDMS), by dissolution in α-chloronaphthalene at 251°C and growth at 238°C. The crystals consist of molecularly folded, rhomb
Publikováno v:
Macromolecules. 24:552-560
It is shown that the structure and morphology of syndiotactic polypropylene depend very sensitively and in a unique wanner on the temperature of crystallization. Moreover, as the temperature of crystallization is lowered, edge-on lamellae of isotacti
Publikováno v:
Polymer. 31:2253-2259
We have examined the general validity and applicability of our newly proposed alternative interchain packing and unit cell for syndiotactic polypropylene, in relation to the long-standing original structural model. Whereas our recent evidence arose f
Publikováno v:
Chemistry of Materials. 8:2836-2838
Using X-ray diffraction and electron microscopy, we have examined the structures of specially synthesized, highly purified oligomers of poly(thiophene) that show exceptionally high semiconductor mo...