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Compared properties of aromatic polyamides containing silicon in the chain

  • Two series of aromatic polyamides incorporating silicon together with phenylquinoxaline or with hexafluoroisopropylidene groups have been synthesized and their properties have been characterized and compared with those of related polymers. These polymers are easily soluble in polar amidic solvents such as N-rnethyl-2-pyrrolidinone and dimethylformamide, and in tetrahydrofuran, and can be cast into thin, transparent films from solution. The polyamides have weight- and number-average molecular weights in the range of 10000-40000 and 3000-6000, respectively, and polydispersities in the range of 3-10. They show glass transition temperatures in the range of 236 °C-275 °C and decomposition temperatures above 400 °C. The polymer films have low dielectric constants in the range of 3.26-3.68, and good mechanical properties (tensile strength 74-100 MPa, tensile modulus 180-386 MPa), thus being comparable with other high performance dielectrics.

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Metadaten
Author:Ion Sava, Marta Szesztay, Maria Bruma, Frank W. Mercer, Burkhard SchulzORCiDGND
Document Type:Article
Language:English
Year of first Publication:1997
Year of Completion:1997
Release Date:2017/03/24
Source:Angewandte Makromolekulare Chemie. - 253 (1997), S. 169 - 182
Organizational units:Zentrale und wissenschaftliche Einrichtungen / Interdisziplinäres Zentrum für Dünne Organische und Biochemische Schichten