Polymer Films Possessing Nanoreinforcements via Organically Modified Layered Silicate

Abstract

UV-curable polymer films were prepared containing a commercially available, organically modified montmorillonite (MMT). It is believed that nanoclay-containing UV-curable polymers can find wide ranging applications in future microelectronic materials. Polymer films containing the commercially available MMT clay (Nanomer) exhibited enhancements in properties. The polymer films were studied with various microanalytical techniques including XRD, TEM, and SEM to determine their micromorphology. Physical properties and curing kinetics were examined using FTIR and thermal analysis. It was found that the incorporation of clay reduced cure time. Tensile modulus, strength, and glass transition temperature all increased with clay content. Dimensional stability improved with addition of clay. Adhesion between the UV-curable film and polysulfone substrate also dramatically improved. The presence of commercially modified MMT clay, however, rendered the polymers more susceptible to thermal degradation.

Kinetic investigations on the UV‐induced photopolymerization of nanocomposites by FTIR spectroscopy

“…The reason for this phenomenon is unclear. But a similar phenomenon was also observed in the UV coating containing organically modified layered silicate, reported by Uhl et al 13 The increment in curing speed at lower nanosilica content suggests that the presence of nanosilica enhances the curing reaction, may be resulting from inhibition effect of the inorganic network on bimolecular termination.…”

“…The reported research work mainly concentrates on the synthesis and characterization of the resultant UV-curable nanocomposites films. [12][13][14][15] However, the kinetics study is also very important to understand the final property and microstructure of UV-curable nanocomposites because the advantages of UV-curing are shown on its curing process rather than on the resultant materials properties.…”

Synthesis and characterization of polysulfone/layered double hydroxides nanocomposite membranes for fuel cell application

“…When the LDH content increases up to 5 wt%, two very weak and broad diffraction peaks appear at 2q z 9.4 and 10 , one of them could correspond to the main diffraction peak of Zn,Al NO 3 LDH (d 003 ). On the other hand, for composite membranes with 2 and 5% of LDH, also appears a new peak at 2q z 5.5e6 that could be associated to the intercalation of the part of the polymer between the interlayer of the LDH [23,24].…”

Properties of nanocomposites based on maleate‐vinyl ether donor—acceptor UV‐curable systems

“…A slight increase in the polymerization rate has been reported by Uhl et al and others upon the incorporation of clay in acrylate systems. 12,13,18,19 The dramatic difference observed in conversion in Coating 3 when compared with others may be attributable to the relatively low T g of the constituent polyester which was À49.588C (when compared with Polyesters 1, 2, and 4 with T g s of À41.07, À36.62, and À35.618C) and can therefore facilitate a higher degree of interaction with the clay and thereby significantly affect properties.…”

“…Some of these clays were commercially procured and other organomodified clays were prepared using an ion-exchange process. [18][19][20] These studies reported enhancements in Young's modulus and general improvements in mechanical and thermal properties even when the nanocomposites showed an intercalated morphology, with the incorporation of organomodified clay. It was found that while the cure time was reduced with the incorporation of clay, properties such as tensile modulus, tensile strength, glass-transition temperature increased with the clay content.…”