Mostra el registre d'ítem simple
Study of hyperbranched poly(ethyleneimine) polymers of different molecular weight and their interaction with epoxy resin
dc.contributor.author | Román Concha, Frida Rosario |
dc.contributor.author | Colomer Vilanova, Pere |
dc.contributor.author | Calventus Solé, Yolanda |
dc.contributor.author | Hutchinson, John M. |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics |
dc.date.accessioned | 2018-04-12T13:48:43Z |
dc.date.available | 2018-04-12T13:48:43Z |
dc.date.issued | 2018-03-09 |
dc.identifier.citation | Roman, F., Colomer, P., Calventus, Y., Hutchinson, J.M. Study of hyperbranched poly(ethyleneimine) polymers of different molecular weight and their interaction with epoxy resin. "Materials", 9 Març 2018, vol. 11, núm. 3 (410), p. 1-26. |
dc.identifier.issn | 1996-1944 |
dc.identifier.uri | http://hdl.handle.net/2117/116205 |
dc.description.abstract | Two different commercial hyperbranched poly(ethyleneimine)s (HBPEI), with molecular weights (MW) of 800 and 25,000 g/mol, and denoted as PEI800 and PEI25000, respectively, as well as the mixtures with a Diglycidyl Ether of Bisphenol-A (DGEBA) epoxy resin, have been studied using thermal analysis techniques (DSC, TGA), dielectric relaxation spectroscopy (DRS), and dynamic mechanical analysis (DMA). Only a single glass transition is observed in these mixtures by DSC. DRS of the HBPEIs shows three dipolar relaxations: ¿, ß, and a. The average activation energy for the ¿-relaxation is similar for all HBPEIs and is associated with the motion of the terminal groups. The ß-relaxation has the same average activation energy for both PEI800 and PEI25000; this relaxation is attributed to the mobility of the branches. The a-relaxation peak for all the HBPEIs is an asymmetric peak with a shoulder on the high temperature side. This shoulder suggests the existence of ionic charge trapped in the PEI. For the mixtures, the ¿- and ß-relaxations follow the behaviour of the epoxy resin alone, indicating that the epoxy resin dominates the molecular mobility. The a-relaxation by DRS is observed only as a shoulder, as a consequence of an overlap with conductivity effects, whereas by DMA, it is a clear peak. |
dc.format.extent | 26 p. |
dc.language.iso | eng |
dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Spain |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
dc.subject | Àrees temàtiques de la UPC::Enginyeria dels materials |
dc.subject.lcsh | Polymers--Testing |
dc.subject.lcsh | Composite materials |
dc.subject.other | Hyperbranched polymers |
dc.subject.other | Poly(ethyleneimine) |
dc.subject.other | Epoxy resin |
dc.subject.other | Dielectric relaxations |
dc.subject.other | Dynamic mechanical relaxations |
dc.title | Study of hyperbranched poly(ethyleneimine) polymers of different molecular weight and their interaction with epoxy resin |
dc.type | Article |
dc.subject.lemac | Polímers -- Proves |
dc.subject.lemac | Materials compostos |
dc.contributor.group | Universitat Politècnica de Catalunya. POLTEPO - Polímers Termoestables Epoxídics |
dc.identifier.doi | 10.3390/ma11030410 |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://www.mdpi.com/1996-1944/11/3/410 |
dc.rights.access | Open Access |
local.identifier.drac | 22036131 |
dc.description.version | Postprint (published version) |
local.citation.author | Roman, F.; Colomer, P.; Calventus, Y.; Hutchinson, J.M. |
local.citation.publicationName | Materials |
local.citation.volume | 11 |
local.citation.number | 3 (410) |
local.citation.startingPage | 1 |
local.citation.endingPage | 26 |
dc.identifier.pmid | 29522480 |
Fitxers d'aquest items
Aquest ítem apareix a les col·leccions següents
-
Articles de revista [115]
-
Articles de revista [471]