Studies on Bulk Intercalation Polymerization of PMMA/Montmorillonite Intercalated Nanocomposite by Dynamic Torsion Vibration Method

Abstract

Abstract: The intercalation and dynamic mechanics behavior of PMMA in organ clay have been investigated by the dynamic torsional vibration methods. With the mechanical methods the cure process can be studied successfully. The Flory′s gelation theory and non-equilibrium thermodynamic fluctuation theory were used to predict the gel time t_g and the cure behavior of PMMA/organo-montmorillonite intercalated nanocomposites at various temperatures and Org-MMT loadings. The theoretical prediction is in good agreement with the experimental results obtained by so-called dynamic torsional vibration method, and the results show that the addition of Org-MMT increases the gel time t_g and reduces the rate of curing reaction. The last stage of polymerization of the PMMA in Org-MMT is similar to the cure process of the thermosetting resin and that implies the crosslinkings form. We can estimate the apparent curing activation energy and study the change of the mechanical behavior of the resin system corresponds to the change of the Org-MMT content. The addition of Org-MMT(MMT/MMA<5%) has no apparent effect on the apparent activation energy of the cure reaction.

Key words: Dynamic torsion vibration method, PMMA, Montmorillonite, Nanocomposite, Apparent activation energy

CLC Number:

O633

TrendMD:

ZOU Gang, FANG Kun, SHENG Xia, HE Ping-Sheng . Studies on Bulk Intercalation Polymerization of PMMA/Montmorillonite Intercalated Nanocomposite by Dynamic Torsion Vibration Method[J]. Chem. J. Chinese Universities, 2003, 24(3): 537.

References

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