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  • 1
    Electronic Resource
    Electronic Resource
    The kinetics, thermal and mechanical properties of epoxy-polycarbonate blends cured with aromatic amine (1998)
    Springer
    Journal of polymer research 5 (1998), S. 115-124 
    Details
    ISSN: 1572-8935
    Keywords: Epoxy ; Blend ; Polycarbonate ; Transesterification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract PC-DER331 blends are transparent and homogeneous due to the transesterification taking place during hot melting process. This transesterification reaction does not occur or occurs insignificantly during the preparation of PC-DER332 blends. PC is separated from the PC-DER332 melt mixture by slow cooling to room temperature but the mixture remains a single phase by quenching with an ice bath. Two systems of PC-epoxy blends, PC-DER331 blends and PC-DER332 blends are cured by the m-phenylene diamine (MPDA) in a stoichiometric ratio. Curing kinetics have been carried out by differential scanning calorimeter (DSC). The presence of PC accelerates the curing reaction. Infrared spectroscopy (IR) indicates the occurrence of transesterification in the PC-DER331/MPDA blends during curing. The flexural modulus increases with the increase of the PC content while the notched Izod impact strength decreases with the increase of the PC content for all the blending systems. The fracture surfaces of the PC-DER331/MPDA blends are smooth, an indication of a homogeneous morphology. The fracture surfaces of the PC-DER332/MPDA blends are rough, an indication of a heterogeneous morphology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10965-006-0047-6
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  • 2
    Electronic Resource
    Electronic Resource
    Chemical reactions, thermal and mechanical properties of epoxy — Polycarbonate blends cured with aromatic amines (1996)
    Springer
    Journal of polymer research 3 (1996), S. 177-184 
    Details
    ISSN: 1572-8935
    Keywords: Epoxy ; Polycarbonate ; Transesterification ; Transamidation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Bisphenol-A polycarbonate (PC) has been incorporated into epoxy resin cured with 4,4′-diaminodiphenyl sulphone (DDS) and 4,4'-diaminodiphenyl methane (DDM). IR spectra reveal that transesterification and transamidation occur between the carbonate group of PC and the hydroxyl group of cured epoxy resin for the DDM-cured system, and that only transesterification occurs for the DDS-cured system. Scanning electron micrographs (SEM) show no evidence of phase separation in these cured systems, which is an indication of full miscibility between the bisphenol-A monomers and PC-oligomers with the copolymer network. The mechanical strength and glass transition temperature (Tg) fluctuate with PC content, whereas the flexural modulus shows a steadily increasing tendency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01494528
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    Paper (German National Licenses)
    Fulltext
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