Confinement effects on the kinetics of formation of sequential semi-interpenetrating polymer networks

Lipatov, Yu.S.; Alekseeva, T. T.; Sorochinskaya, L. A.; Dudarenko, Galina

doi:10.1007/s00289-007-0814-5

Cited by 9 publications

(10 citation statements)

References 21 publications

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“…The appearance of new peak or the shift in spectral band arises from hydrogen bonding between hydrogen and oxygen atom of C=O or from the strong adhesion of metal oxide with the C=O group or from both. This type of intermolecular interaction was observed in the pioneering work of Lipatov et al [18]. Thus, from the FTIR spectra, it is confirmed that the nanoparticles are successfully polymerised within the macromolecular chain of PBMA.…”

Section: Ftir Spectral Analysissupporting

confidence: 66%

Synthesis, characterisation and flame, thermal and electrical properties of poly (n-butyl methacrylate)/titanium dioxide nanocomposites

et al. 2016

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Nanocomposites based on poly (n-butyl methacrylate) (PBMA) with various concentrations of titanium dioxide (TiO 2 ) nanoparticles were synthesised by in situ free radical polymerisation method. The formation of nanocomposite was characterised by FTIR, UV, XRD, DSC, TGA, impedance analyser and flame retardancy measurements. FTIR and UV spectrum ascertained the intermolecular interaction between nanoparticles and the polymer chain. The XRD studies indicated that the amorphous region of PBMA decreased with the increase in content of metal oxide nanoparticles. The SEM revealed the uniform dispersion of nanoparticles in the polymer composite. The DSC and TGA studies showed that the glass transition temperature and thermal stability of the nanocomposites were increased with the increase in the concentration of nanoparticles. The conductivity and dielectric properties of nanocomposites were higher than pure PBMA and the maximum electrical property was observed for the sample with 7 wt% TiO 2 . As the concentration of nanoparticles increased above 7 wt%, the electrical property of nanocomposite was decreased owing to the agglomeration of nanoparticles in the polymer. Nanoparticles could impart better flame retardancy to PBMA/TiO 2 composite and the flame resistance of the materials improved with the addition of nanoparticles in the polymer matrix.

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Section: Ftir Spectral Analysissupporting

confidence: 66%

Synthesis, characterisation and flame, thermal and electrical properties of poly (n-butyl methacrylate)/titanium dioxide nanocomposites

et al. 2016

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“…44 Usually phase separation will happen if the miscibility between the two different polymers is low. 45 Polymerization kinetics are also expected to play an important role in the final structure and property relationships of the IPN. The kinetics could be influenced by the presence of water.…”

Section: Resultsmentioning

confidence: 99%

The influence of water on visible-light initiated free-radical/cationic ring-opening hybrid polymerization of methacrylate/epoxy: polymerization kinetics, crosslinking structure and dynamic mechanical properties

Song

et al. 2015

RSC Adv.

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The objective of this study was to determine the influence of water on the polymerization kinetics, crosslinking structure and dynamic mechanical properties of methacrylate/epoxy polymers cured by visible-light initiated free-radical/cationic ring-opening hybrid polymerization. Water-containing formulations were prepared by adding ~4–7 wt% D2O depending on the water miscibility of monomer resins. The water-containing adhesives were compared with the adhesives photo-cured in the absence of water. The results show an improved degree of conversion for both methacrylates and epoxy by adding water. The rate of the epoxy cationic ring-opening reaction is increased while the rate of free radical polymerization is decreased in the presence of water. The decreased crosslinking density noted in the presence of water suggests that the chain transfer reaction between water and epoxy competes with the hydroxyl-based chain transfer mechanism. There is potential application of this visible-light initiated hybrid polymerization in biomaterials, e.g. dental restorations and tissue engineering scaffolds.

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“…To analyze the data, a linear baseline corresponding to heat flow at the end of the reaction was chosen. Dividing the total heat flow measured by DSC over the course of the polymerization by the heat flow due to the reaction at an indicated time (the difference between the measured heat flow at any given time and the baseline heat flow), gives the reduced polymerization rate ( W red )36 for the indicated time. The measured rate of polymerization is equal to the first derivative of the double bond conversion, x , with respect to time.…”

Section: Methodsmentioning

confidence: 99%

“…For simultaneous IPNs, the kinetics of the reaction of both components in the starting mixture was thoroughly studied 35. However, the kinetics of the reaction of the formation of the second linear or cross‐linked polymers in first networks is so less investigated 36–38. Sequential full IPNs of poly(2‐hydroxyethyl methacrylate) (PHEMA) or PAAc/PDMS have been widely investigated by Abbasi et al, especially in terms of their biomedical applications 8, 39–42.…”

Section: Introductionmentioning

confidence: 99%

Silicone‐based hydrogels prepared by interpenetrating polymer network synthesis: Swelling properties and confinements effects on the formation kinetics

Alizadeh

Abbasi

Farahi

et al. 2011

J of Applied Polymer Sci

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In this work, interpenetrating polymer networks (IPNs) of polydimethylsiloxane (PDMS) and poly(acrylic acid) or poly(2‐hydroxyethyl methacrylate) (PHEMA) have been synthesized employing a sequential method. Monomeric AAc or HEMA was introduced into the PDMS network by swelling the polymer in solutions of monomer. The polymerization of monomers was then conducted in the swollen network. The swelling properties of the IPNs were investigated by varying the monomer concentrations in the polymerization and more swelling was observed with low monomer concentrations due to the prevalence of cyclization reactions. Multi‐step polymerization used to achieve IPNs with high hydrogel contents, did not improve their water uptake. The kinetics of acrylic acid polymerization was studied under various conditions. Specifically, in the presence of confinement effects imposed by the PDMS network a considerable drop in the rate of reaction was observed. The cross‐linking density of the PDMS network was also studied how to affect the reaction rate. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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Confinement effects on the kinetics of formation of sequential semi-interpenetrating polymer networks

Cited by 9 publications

References 21 publications

Synthesis, characterisation and flame, thermal and electrical properties of poly (n-butyl methacrylate)/titanium dioxide nanocomposites

Synthesis, characterisation and flame, thermal and electrical properties of poly (n-butyl methacrylate)/titanium dioxide nanocomposites

The influence of water on visible-light initiated free-radical/cationic ring-opening hybrid polymerization of methacrylate/epoxy: polymerization kinetics, crosslinking structure and dynamic mechanical properties

Silicone‐based hydrogels prepared by interpenetrating polymer network synthesis: Swelling properties and confinements effects on the formation kinetics

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