Studio di catalisi termoattivate per compositi poliuretanici


Autoria(s): Cuoghi, Valentina
Contribuinte(s)

Salatelli, Elisabetta

Bramante, Guido

Data(s)

19/10/2012

31/12/1969

Resumo

One of the key processing parameters in thermoset composites manufacturing is to have an optimum balance between open time and cure time. Long open times followed with a fast cure profile (also referred as snap cure or “hockey stick” shaped profiles) are required on applications like Pultrusion, Filament Winding, Resin Transfer Molding (RTM) and Infusion. In this work, several factors affecting the reactivity of a base line polyurethane formulation were studied. The addition of different components such as internal mold release agents, cross-linker, polyols having different molecular structure and isocyanates having different functionality were studied. A literature search was conducted to identify the main catalyst packages existing in the market. The reactivity of catalyst based on tertiary amines, orgamometallic salts, and co-catalyst of amine-organometallic complexes was characterized. Addition of quelants agents such as thioglycerol and acetyl acetone to delay the catalyst activity were also considered. As a consequence of this work a vast reactivity map was generated. This should guide the formulation designer in future product generations for the further development of the mentioned applications. Recommendations on measurements systems and further areas of exploration are also given.

Formato

application/pdf

Identificador

http://amslaurea.unibo.it/4388/1/cuoghi_valentina_tesi.pdf

Cuoghi, Valentina (2012) Studio di catalisi termoattivate per compositi poliuretanici. [Laurea magistrale], Università di Bologna, Corso di Studio in Chimica industriale [LM-DM270] <http://amslaurea.unibo.it/view/cds/CDS0884/>

Relação

http://amslaurea.unibo.it/4388/

Direitos

info:eu-repo/semantics/openAccess

Palavras-Chave #materiali compositi, poliuretani, catalisi #Chimica industriale [LM-DM270] #cds :: 0884 :: Chimica industriale [LM-DM270] #sessione :: seconda
Tipo

PeerReviewed

info:eu-repo/semantics/masterThesis

Idioma(s)

it

Publicador

Alma Mater Studiorum - Università di Bologna