Synthesis and characterization of an epoxy based thermoset containing a fluorinated thermoplastic

M.E. PENOFF; G. PAPAGNI; M.J. YAÑEZ; P.E. MONTEMARTINI; P.A. OYANGUREN

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS

John Wiley & Sons

Lugar: HOBOKEN, NJ 07030; Año: 2007 vol. 45 p. 2781 - 2792

0887-6266

A novel fluorinated thermoplastic (FT) was synthesized from diglycidylether of bisphenol A (DGEBA), and 3-(trifluoromethyl)aniline. FT was found to bemiscible with DGEBA as shown by the existence of a single glass transition tempera-ture (Tg) within the whole composition range. On the basis of several experimentaltechniques, it was found that upon heating etherification reaction takes placebetween FT and DGEBA. A DGEBA-aromatic diamine (4,40-methylenebis(3-chloro2,6-diethylaniline) formulation was modified with the FT. The influence of FT on theepoxy-amine kinetics was investigated. Both structural parameters, gelation, and vit-rification, were found to be affected by etherification reaction between epoxy andhydroxyls groups belonging to FT. The presence of ether linkages induced systemstoichiometry modification. In addition, the curing conditions influence on FT migra-tion towards the surface was studied on samples prepared with 20 wt % of modifier.SEM?EDX analysis confirmed that modified systems exhibits notable fluorine enrich-ment within the uppermost 200 um.