Novel azo-peresters radical initiators used for the synthesis of acrylic pressure-sensitive adhesives

Czech, Zbigniew; Herko, Ewa; Hefczyc, Barbara; Zawadiak, Jan

doi:10.3144/expresspolymlett.2008.33

Cited by 12 publications

(9 citation statements)

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“…xanthates (MADIX) polymerizations [25][26][27][28][29][30]. More distinct and specific results are obtained by combining CRP mechanisms with certain other processes [31,32]. DFT allows the approximate inclusion of electron correlation at a lower computational cost compared to traditional linked ab initio methods such as Møller-Plesset perturbation theory, configuration interaction, and combined set theory.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, spectral characterization and DFT calculations of novel macro MADIX agent: mechanism of addition-fragmentation reaction of xanthate compound

2020

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In this study, the macromolecular design was performed via interchange of xanthates (MADIX) polymerization. The macro RAFT/MADIX agent containing the structure of polytetrahydrofuran (PTHF) (average Mn ~ 1000 g/mol) was synthesized to use in the polymerization. PS-b-PTHF-b-PS triblock copolymer was obtained by styrene-controlled radical polymerization using the RAFT/MADIX agent. The plot of ln [M] o /[M] versus monomer concentration versus polymerization time exhibits first-order kinetic behavior. Block copolymer formation has a controlled character. The formation of the narrow molecular weight polymer controlled by the styrene's RAFT/MADIX polymerization is confirmed by the increase in the polymerization time of the molecular weight. The results are in good agreement with theoretical values. Block copolymers having a narrow molecular weight distribution and a predetermined average molecular weight have been obtained using this polymerization process. The synthesized RAFT/MADIX agents, polymer, and copolymers were characterized by NMR and FT-IR spectroscopy, GPC, and differential scanning calorimetry. Based on the vibration analysis, the thermodynamic properties of the compound were also calculated. Optimized structure, frontier molecular orbitals (HOMO and LUMO) and global reactivity descriptors were analyzed by DFT calculations. As a result of the DFT study with trimer and hexamer; although the chain length is increased, the energy parameters obtained are very proximate to each other.

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Section: Introductionmentioning

confidence: 99%

Synthesis, spectral characterization and DFT calculations of novel macro MADIX agent: mechanism of addition-fragmentation reaction of xanthate compound

2020

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“…They are used in self-adhesive tapes, splicing tapes, labels, protective films, sign, and marking films as well as in dermal dosage systems for pharmaceutical applications and in biomedical electrodes [1].…”

Section: Introductionmentioning

confidence: 99%

UV-initiated crosslinking of photoreactive acrylic pressure-sensitive adhesives using excimer-laser

et al. 2012

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UV-initiated crosslinking technology is well established in the market and allows the production of a wide range of ultraviolet (UV)-crosslinkable pressure-sensitive adhesives (PSA) with interesting features. The balance between such properties as adhesive and cohesive strengths within the crosslinked self-adhesive coatings is critical for their performance. The UV crosslinking of acrylic PSA, especially for following properties: tack, peel adhesion, and shear strength of selfadhesive polymer layers, has been investigated using UV excimer-laser and UV lamp as UV sources. It was observed that after UV crosslinking of acrylic PSA using excimer-laser in comparison with typical UV lamp, high-quality PSA products with excellent properties, such as tack, peel adhesion, shear strength, and shrinkage were received.

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“…These compounds can initiate polymerization at various copolymerization stages according to a free radical chain mechanism. The polymerization of various unsaturated monomers initiated by azo-peroxyesters has been tested [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the thermal decomposition of azo-peroxyesters by Arrhenius-type and three-parameter equations

Hefczyc

Siudyga

Zawadiak

et al. 2011

J Therm Anal Calorim

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Thermogravimetric analysis of azo-peroxyesters revealed two decomposition stages on TG curves. Molecular nitrogen is released in the first stage and carbon dioxide in the second. Fitting the thermogravimetric data by means of the three-parameter model and a classic one based on an Arrhenius-type kinetic equation showed that the former approach satisfactorily describes the process within the wide range of the extent of decomposition. It was found that two coefficients of the three-parameter equation are related to the temperature of maximum reaction rate. One of the coefficients of the three-parameter equation is also related to the activation energy. The compounds investigated can be grouped with respect to their kinetic characteristics, structure and stage of decomposition.

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Novel azo-peresters radical initiators used for the synthesis of acrylic pressure-sensitive adhesives

Cited by 12 publications

References 11 publications

Synthesis, spectral characterization and DFT calculations of novel macro MADIX agent: mechanism of addition-fragmentation reaction of xanthate compound

Synthesis, spectral characterization and DFT calculations of novel macro MADIX agent: mechanism of addition-fragmentation reaction of xanthate compound

UV-initiated crosslinking of photoreactive acrylic pressure-sensitive adhesives using excimer-laser

Analysis of the thermal decomposition of azo-peroxyesters by Arrhenius-type and three-parameter equations

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