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A polymeric triarylmethane dye as a sensitizer for photoconductivity

01-Jan-1986 | Mitra, Smarajit, Journal of Polymer Science: Polymer Symposia, 1986

Abstract A polymeric analogue of crystal violet in which the triarylmethane moiety is pendent from a polyester backbone has been examined as a sensitizer for photoconductivity in poly‐N‐vinyicarbazole. In both positive and negative surface charging modes, the dark decay rates increase linearly ...

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Mass spectrometric detection of cyclic sulfides in the polycondensation of dibromoalkanes with dithiols

01-Jan-1986 | Montaudo, G.; Scamporrino, E.; Puglisi, C.; Vitalini, D., Journal of Polymer Science: Polymer Symposia, 1986

Abstract MS analysis was used to identify the cyclic oligomers formed in the polycondensation reactions of dibromoalkanes with dithiols. Cyclic oligomers with only an even number of repeating units are detected among the poly condensation reaction products.

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On predicting free radical polymerizability of allyl monomers. MINDO/3 and 13C NMR results

01-Jan-1986 | Vaidya, Rajeev A.; Mathias, Lon J., Journal of Polymer Science: Polymer Symposia, 1986

Abstract Two new methods of predicting free radical polymerizability of allyl monomers have been developed. MINDO/3 calculations of eigenvalues for the C—H bond a to the atlyl substituent allow comparison of relative bond strengths. Monomers known to undergo degradative chain transfer display ...

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Synthesis of acetylene‐terminated monomers using a polymer‐supported palladium catalyst

01-Jan-1986 | Trumbo, D. L.; Marvel, C. S., Journal of Polymer Science: Polymer Symposia, 1986

Abstract A single‐crysial polyethylene‐bound palladium catalys: was prepared and used in the synthesis of acelylene‐terminated monomers.

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Determination of the sequence distribution and ionization constant of poly(acrylic acid‐co‐vinylamine) by C‐13 NMR

01-Jan-1986 | Chang, C.; Muccio, D. D.; Pierre, T. St., Journal of Polymer Science: Polymer Symposia, 1986

Abstract Three copolymers of poly(acrylic acid‐co‐vinylamine) containing 12% (SP12). 30% (SP30), and 52% (SP52) amino groups were synthesized from poly(acrylic acid) by means of the Schmidt reaction. These copolymers were analyzed by C‐13 NMR and the results compared wiih the previously ...

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Dynamic dielectric analysis: Development of techniques for following the curing process of laminating polyester resins

01-Jan-1986 | Hoffman, R. D.; Godfrey, J. J.; Ehrig, R. J.; Kranbuehl, D. E.; Weller, L.; Hoff, M., Journal of Polymer Science: Polymer Symposia, 1986

Abstract DDA measurements made over a wide frequency range with a novel sensor are used to determine the onset of reaction, variation in viscosity, onset of gel, and reaction completion in a series of peroxide‐initiated unsaturated polyester resins diluted in styrene monomer. The dielectric ...

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