Zobrazeno 1 - 10
of 172
pro vyhledávání: '"Frank A. Bovey"'
Autor:
Frank A. Bovey, G. V. D. Tiers
Publikováno v:
Journal of Polymer Science Part A: Polymer Chemistry. 34:711-720
Spectra of methyl methacrylate polymers in chlorofornm solution at 90° show three α-methyl proton peaks. Measurements of their areas in spectra of polymers prepared with free radical and anionic initiators indicate that these may be attributed to (
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:
Macromolecules. 25:2854-2859
A comparison is made between the structures and properties of the poly(dimethylsilylene-co-di-n-hexylsilylene) and those of the corresponding homopolymers. While the two homopolymers adopt the same chain conformation in the solid state, they differ s
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. 24:6764-6768
Polyethylene (PE) in the perhydrotriphenylene inclusion compound was studied by solid state 13 C NMR. The results indicate that the isolated chains of PE adopt an all trans planar zigzag conformation similar to that of bulk crystalline PE. PE in the
Publikováno v:
Macromolecules. 24:4369-4375
The solid state 13 C NMR results demonstrate that the polymer chains in the inclusion compound adopt a fixed skew-trans-skew conformation similar to that of the β-cristal structure. A similarity in local chain motions is observed for the polyisopren
Publikováno v:
Polymer International. 26:29-34
High resoluton NMR can be used for polymer characterization both in solution and in the solid state. The power of NMR as a method arises from the observation of individual carbon and proton atoms along the main chain and side chains of polymers. This
Publikováno v:
Journal of Magnetic Resonance (1969). 89:572-577
Two-dimensional NMR has revolutionized materials characterization and solution structure determination mainly due to the increase in resolution that accompanies the introduction of a second frequency dimension (Z-3). Through-space nuclear Overhauser