INVESTIGADORES
HOPPE cristina elena
congresos y reuniones científicas
Título:
REVERSIBLE EPOXY NETWORKS WITH PHYSICAL CROSSLINKS BASED ON TAIL-TO-TAIL ASSOCIATIONS OF ALKYL CHAINS
Autor/es:
J. PUIG; C.E. HOPPE; I.A.ZUCCHI; A. LEDO SUÁREZ; M. J. GALANTE; R.J.J. WILLIAMS
Lugar:
Siegen, Alemania
Reunión:
Otro; POLYCHAR 18 World Forum for Advanced Materials; 2010
Resumen:
<!--
/* Font Definitions */
@font-face
{font-family:Helvetica;
panose-1:2 11 6 4 2 2 2 2 2 4;
mso-font-charset:0;
mso-generic-font-family:swiss;
mso-font-pitch:variable;
mso-font-signature:536902279 -2147483648 8 0 511 0;}
@font-face
{font-family:SimSun;
panose-1:2 1 6 0 3 1 1 1 1 1;
mso-font-alt:ËÎÌå;
mso-font-charset:134;
mso-generic-font-family:auto;
mso-font-format:other;
mso-font-pitch:variable;
mso-font-signature:1 135135232 16 0 262144 0;}
@font-face
{font-family:"\@SimSun";
panose-1:0 0 0 0 0 0 0 0 0 0;
mso-font-charset:134;
mso-generic-font-family:auto;
mso-font-format:other;
mso-font-pitch:variable;
mso-font-signature:1 135135232 16 0 262144 0;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{mso-style-parent:"";
margin:0cm;
margin-bottom:.0001pt;
mso-pagination:widow-orphan;
text-autospace:none;
font-size:10.0pt;
font-family:Helvetica;
mso-fareast-font-family:SimSun;
mso-ansi-language:EN-GB;
mso-fareast-language:ZH-CN;}
@page Section1
{size:612.0pt 792.0pt;
margin:70.85pt 3.0cm 70.85pt 3.0cm;
mso-header-margin:36.0pt;
mso-footer-margin:36.0pt;
mso-paper-source:0;}
div.Section1
{page:Section1;}
-->
Linear amphiphilic epoxy
polymers synthesized by the polyaddition of diglycidyl ether of bisphenol A
(DGEBA) with alkylamines like octylamine (OA), dodecylamine (DA) and
hexadecylamine (HA), undergo a physical gelation process through tail-to-tail association
of alkyl chains.1,2 SAXS spectra showed that tail-to-tail
associations of alkyl chains were present since the beginning of polymerization
and remained in the final materials. Initially, these associations correspond
to micelles of the alkylamines dispersed in the solvent (DGEBA). In the course
of polymerization micelles are disaggregated as the individual alkylamine
chains become part of the linear amphiphilic polymer. However, tail-to-tail
associations among alkyl chains attached to the polymer backbone persisted in
the final materials.
