Diffusion and cure kinetic of sonicated nanoclay-reinforced unsaturated polyester resin

Unravelling the thermal behavior and kinetics of unsaturated polyester resin supplemented with organo-nanoclay

“…62 The second region, characterized by conversion degrees greater than 0.8, is associated with the dominance of the diffusion phenomenon over the thermal decomposition reaction. 24,25 As a result, the activation energy for pristine UPR and all three UPR-OMMT systems experiences a sudden decrease. In this nal stage, the movement of the reacting components is limited due to the increasing density of the resin network.…”

“…The cocatalytic effect of the organomodied nanoclay on the curing of the unsaturated polyester resin is evidenced by other studies using isoconvensional and other kinetic models. [23][24][25] The advanced isoconversional method has been proposed as a reliable kinetic method for the treatment of thermoanalytical data. It has been shown to be effective in elucidating complex reaction mechanisms and identifying rate-limiting steps, 26 however, obtaining kinetic parameters with real physical meaning in the case of complex reactions is not straightforward 27 and the use of simple and easy-to-use method as Kamal method is not suitable for complex reactions.…”

“…The co-catalytic effect of the organomodified nanoclay on the curing of the unsaturated polyester resin is evidenced by other studies using isoconvensional and other kinetic models. 23–25…”

Modification of advanced Takayanagi model for the modulus of nanoclay/polymer systems comprising the effectual networks of both nanoclay and interphase section

“…Nanoclay is a respectable applicant for the construction of organic-inorganic nanocomposites, since it can be destroyed to nano-platelets. [1][2][3][4][5][6][7][8][9][10] The polymer penetration into the clay galleries may cause the delaminated platelets (individual layers) or intercalated ones in the stacks with larger spacing among the platelets. [11][12][13][14][15] It was reported that the ion-exchange procedure by alkyl ammonium ions can enhance the hydrophobicity of clay surface and expand the clay packs, which enable the diffusion of polymer molecules into the clay channels.…”

“…Nanoclay is a respectable applicant for the construction of organic–inorganic nanocomposites, since it can be destroyed to nano‐platelets 1–10 . The polymer penetration into the clay galleries may cause the delaminated platelets (individual layers) or intercalated ones in the stacks with larger spacing among the platelets 11–15 .…”