Method of determination of initiator efficiency: application to UV polymerizations using 2,2-dimethoxy-2-phenylacetophenone

Kurdikar, Devdatt L.; Peppas, Nikolaos A.

doi:10.1021/ma00081a017

Cited by 52 publications

(49 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar dependences of both apparent rate constants on conversion were observed in the kinetic modelling of bulk cross-linking diethylene glycol diacrylate photo-polymerization reactions by Kurdikar and Peppas [13] and for other multifunctional monomers [11]. In general, apparent termination rate constants decrease earlier than the apparent propagation rate constants; therefore, auto-acceleration of the polymerization occurs [12]. Apparent propagation rate constants remain unchanged when polymerization is controlled by segmental diffusion, but begin to decrease when translation diffusion becomes the rate-controlling step.…”

Section: Resultssupporting

confidence: 74%

“…It may be observed that at higher initiator concentrations at constant polymerization temperatures the conversions increase faster than at lower ones. Similar observations were made in kinetic studies for other thermally and photo-chemically initiated multifunctional monomers [6,[11][12][13]20]. Both algorithms for apparent rate constant calculation predict similar conversion vs. time profiles.…”

Section: Resultssupporting

confidence: 72%

“…It enables the calculation of the dependence of diffusion coefficient on conversion from the physical properties of pure DAT monomer and polymer. Due to its simplicity, free-volume theory is widely used in the kinetic modelling of various radical polymerizations [7][8][9][10][11][12][13], although other theories may be used, too [7]. All necessary parameters used in free-volume theory were calculated as it was proposed by Zielinski and Duda [18].…”

Section: Kinetic Modellingmentioning

confidence: 99%

“…The reader may notify that in the original version of free-volume theory [16,17] the polymer-polymer diffusion coefficient (D P ) in addition depends on the weight-average molecular weight of polymer (M w ). However, in the kinetic modelling of multifunctional monomers with cross-linking, M w dependence in the expression for D P calculation usually is not included [3][4][5][6][11][12][13]19,20]. The same approach was used in the kinetic modelling of 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy)phenyl]propane by Elliot et al [20] and of diethylene glycol bisallyl carbonate by Hace et al [6].…”

Section: Kinetic Modellingmentioning

confidence: 99%

“…In addition, due to a lack of physicochemical parameters used for kinetic modelling of multifunctional monomers authors usually compare different algorithms for apparent rate constant calculation in the kinetic modelling of monomers such as MMA, styrene and others [7][8][9][10]. Only few studies were done so far on the kinetic modelling of more complicated multifunctional monomers [3][4][5][6][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Comparison of two algorithms for calculation of the apparent rate constant in the kinetic modelling of diallyl terephthalate bulk polymerization

Hace¹

2005

E-Polymers

View full text Add to dashboard Cite

Abstract:In the present study a comparison was made of two most frequently used algorithms for calculation of the apparent rate constant in the kinetic modelling of bulk cross-linking diallyl terephthalate (DAT) polymerization with four different peroxide initiators, bis(4-tert-butylcyclohexyl) peroxydicarbonate, dicyclohexyl peroxydicarbonate, benzoyl peroxide and dicumyl peroxide, in the temperature range from 50 to 150°C and at three different initiator loadings. The first algorithm is the CCS algorithm developed by Chiu, Carratt and Soong and the second is the S algorithm developed by Smoluchowski. Only two kinetic parameters had to be found by fitting a previously proposed kinetic model for bulk DAT polymerization, developed by Hace et al., to measured conversion points. Conversions and other necessary physico-chemical properties used for kinetic modelling were obtained from our previous kinetic studies on DAT polymerization.

show abstract

Section: Resultssupporting

confidence: 74%

Section: Resultssupporting

confidence: 72%

Section: Kinetic Modellingmentioning

confidence: 99%

Section: Kinetic Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Comparison of two algorithms for calculation of the apparent rate constant in the kinetic modelling of diallyl terephthalate bulk polymerization

Hace¹

2005

E-Polymers

View full text Add to dashboard Cite

show abstract

A kinetic study of butyl acrylate free radical polymerization in benzene solution

Fernández-Sanz

Madruga²

2000

Macromol. Chem. Phys.

View full text Add to dashboard Cite

Toward an enhanced understanding and implementation of photopolymerization reactions

2008

View full text Add to dashboard Cite

in Wiley InterScience (www.interscience.wiley.com).Photopolymerization reactions proceed rapidly at ambient conditions and are able to exhibit both temporal and spatial control, nevertheless their full potential has been limited by a lack of understanding of the polymerization kinetics and polymer network evolution as well as a lack of custom, functional monomers, and polymerization mechanisms. For the last 15 years, our group has sought to address these limitations by reaction engineering at both the fundamental and applied levels with a focus on increasing the understanding, potential, and implementation of photopolymerization reactions. In particular, we have modeled and experimentally validated the complex spatially dependent polymerization kinetics and network heterogeneity, and we have implemented these systems for applications improvement or development in lithography, microdevice fabrication, biomaterials, biodetection, dental materials, and surface coatings.An illustration of typical photopolymerization kinetic behavior is presented in Figure 2a, where the polymerization rate is plotted as a function of the double bond conversion for two different photoinitiation rates. Two polymerization regimes are clearly identifiable in each curve and are typical Here, the chain length dependence is most prominent at the early stages of the reaction, during autoacceleration and is largely absent at the higher conversions where reaction diffusion controlled termination dominates the termination reaction process. Figure adapted from ref. 80.

show abstract

Method of determination of initiator efficiency: application to UV polymerizations using 2,2-dimethoxy-2-phenylacetophenone

Cited by 52 publications

References 12 publications

Comparison of two algorithms for calculation of the apparent rate constant in the kinetic modelling of diallyl terephthalate bulk polymerization

Comparison of two algorithms for calculation of the apparent rate constant in the kinetic modelling of diallyl terephthalate bulk polymerization

A kinetic study of butyl acrylate free radical polymerization in benzene solution

Toward an enhanced understanding and implementation of photopolymerization reactions

Contact Info

Product

Resources

About