High-temperature curing of oligoether acrylate. Structure-kinetic aspects

Kotova, A. V.; Lantsov, V.M.; Абдрахманова, Л А; Mezhikovskii, S.M.

doi:10.1016/0032-3950(87)90068-2

Cited by 3 publications

(6 citation statements)

References 7 publications

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“…The correctness of this statement was confirmed by in situ structural analysis of the reaction medium using light scattering techniques, NMR spectroscopy and dielectrometry. 22,35,36 The parameter n is highly sensitivite to changes in the structure-phase state of the reaction medium induced by solvents, precipitants, temperature, growth-limiting agents, etc. 23,34 Electron microscopic studies revealed a direct correlation between the numeric values of the parameter n and morphological characteristics of the polymers formed.…”

Section: Structural and Kinetic Heterogeneity Of The Reaction Medium ...mentioning

confidence: 99%

“…53 A large number of `head-to-head' additions of the monomeric units testifies to the microheterogeneity of the copolymer structures at the molecular level. 26 Pulse NMR was used 35,90,91 for the study of formation of network polymers during polymerisation of dimethacrylates. NMR data confirm the validity of the microheterogeneous mechanism of three-dimensional radical polymerisation 23,92 and enable more detailed investigations into formation of network polymers.…”

Section: Nmr Studies Of Formation Of Network Polymersmentioning

confidence: 99%

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State-of-the-art in the studies of three-dimensional radical copolymerisation

Roshchupkin¹,

Kurmaz²

2004

Russ. Chem. Rev.

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The four lowest triplet state energy levels of N,Oii have been measured using a modified form of double-charge-transfer spectroscopy. By studying the energetics of the double-electron-capture reactions of 6 keV OH* ions in collisions with N,O molecules, the lowest triplet state energy levels have been determined t o be 36.0r0.5, 38.010.5, 40.910.5 and 42.010.5eV. The ringlet state energy levels of the N,O'+ ion have been investigated by means of photon induced Auger electron spectroscopy. The 0 and N KLL Auger electron spectra have been recorded where the interpretation of the nitrogen spectrum differs greatly from the earlier assignment. Ten distinct S I~C I U T~E are observable in the spectraatenergiesaf37.4+0.1, 39.4ztO.1,43.110.1, 43.8+0.2, 44.5+0.2,46.7+0.2, 47.91 0.5, 49.8+0.2, 54.0+0.5 and 55.410.2eV. All stmctures in both Auger spectra can be assigned in terms of singlet coupled doubly ionized final states. The experimental results have been compared with recent theoretical and experimental data from other laboratories.

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Section: Structural and Kinetic Heterogeneity Of The Reaction Medium ...mentioning

confidence: 99%

Section: Nmr Studies Of Formation Of Network Polymersmentioning

confidence: 99%

State-of-the-art in the studies of three-dimensional radical copolymerisation

Roshchupkin¹,

Kurmaz²

2004

Russ. Chem. Rev.

View full text Add to dashboard Cite

show abstract

“…This equation is widely applied to describe phase transitions (crystallization, reactions in the solid phase, etc.). The chemical reaction after the appearance of microgel particles proceeds under microheterogeneous conditions and is accompanied by exhaustion of reactive groups both inside the microgel particles and between them, i.e., with participation of the surface groups [316]. In IPNs the reaction also proceeds inside the evolved phases and at the interface between them, although this process has never been investigated.…”

Section: Description Of Reaction Kinetics In Terms Of Phase Transitionmentioning

confidence: 98%

“…Because of this, one can conclude that the microphase separation accompanying chemical reaction leads to the change of the shapes of microgel and microphase particles in such a way that this change enhances their interaction. Increasing the value of n, according to [316,317], means that the main contribution to the reaction belongs to the localization of the cross-linking at the interface of microphase particles. However, we believe that the consideration of the kinetic effects within the framework of the proposed model allows us to explain the processes of cross-linking in IPNs after two phases have already evolved, to explain cross-linking at the interface between phases.…”

Section: Description Of Reaction Kinetics In Terms Of Phase Transitionmentioning

confidence: 99%