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Home > Polymers > Research

RESEARCH LINE

Toughened resins and blends.

Involved People: Mariaenrica Frigione, Alfonso Maffezzoli, Francesca Lionetto, Emanuela Cal˛
The modification of thermosetting resins has been explored in order to impart them better impact resistance properties. Epoxy resins, as well as other thermosetting polymers, in fact, even though possessing superior mechanical properties along with exceptional resistance to most of the chemical agents, present an inherent brittleness than represents their main drawbacks. The enhancement of the toughness of thermosets, in particular epoxies, was the subject of several different studies worldwide in the past decades and many have been the modifiers proposed to this aim. A contribution to this theme was provided as the result of a collaboration with Loughborough University (U.K.).
FIG. 1 - SEM micrograph for sample RU (composition: 100 parts of Epikote 828, 80 parts of HHPA, 10 parts of CTBN, 1 part of BDMA), cured at 115░C.
(From: M. Frigione, D. Acierno, L. Mascia, "Miscibilization of Low Molecular Weight Functionalized Polyethylenes in Epoxy Resins: Part 2. Effects of Curing on Morphological Features and Mechanical Properties", Advances in Polymer Technology, Vol. 18, No. 3, pp. 237-253 (1999))
FIG. 2 - Sample surfaces fractured through impact tests: Der 332/DAT/20 pphr of microspheres.
(From: M. Frigione, E. Cal˛, A. Maffezzoli, D. Acierno, C. Carfagna, V. Ambrogi, "Preformed Microspherical Inclusions for Rheological Control and Physical Property Modification of Epoxy Resins", Journal of Applied Polymer Science, Vol. 100, pp. 748-757 (2006))

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University of Salento   FacoltÓ di Ingengeria    Department of Engineering for Innovation