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Polymer composites of poly (ether imide) polyaniline : preparation and characterization

Author(s):
Evandro Mendes Alexandrino
Total Authors: 1
Document type: Master's Dissertation
Institution: Universidade Estadual de Campinas (UNICAMP). Instituto de Química
Defense date:
Examining board members:
Bluma Guenther Soares; Ana Flávia Nogueira
Advisor: Maria Isabel Felisberti
Abstract

The combination of polyaniline (PAni) with thermoplastics, thermosets and elastomers as composites and blends has been widely studied in the last two decades. However, the use of high thermal performance thermoplastic in composites or blends with polyaniline has been little explored due to the high processing temperatures of these thermoplastics and the fact that under these conditions the PAni presents thermal instability according to the nature of the dopant used. The polyetherimide (PEI) is an engineering thermoplastic presenting good thermal and mechanical properties, however, it is processed in the melting state at high temperatures. In this dissertation, PAni was synthesized in laboratory scale by chemical oxidation, leading to hydrochloric acid doped PAni (PAni HCl) was dedoped and redoped to obtain p-toluene sulfonic acid doped PAni (PAni APTS) or a cobalt - acetonitrile complex doped PAni (PAni CoAcn). PEI composites were prepared with PAni APTS, in the composition range of 2.5 to 20wt%, by extrusion in a twin screw mini-compounder. PEI plasticized composites (PEIR) with resorcinol bis(diphenyl phosphate) (RDP), were also prepared with PAni APTS and PAni CoAcn, at the same composition range. The PAni synthesized and the composites were characterized by thermal, morphological, mechanical and electrical methods. The composite exhibited good mechanical and thermal properties, especially those with PAni CoAcn, nevertheless they still stand as insulating materials. (AU)

FAPESP's process: 10/03383-0 - Polymer composites of poly(ether imide)/Polyaniline: preparation and characterization
Grantee:Evandro Mendes Alexandrino
Support type: Scholarships in Brazil - Master