1
|
RHEOKINETIC AND MORPHOLOGICAL FEATURES OF THE REACTION FORMATION OF A POLYMER COMPOSITE MATERIAL BASED ON IMPACT-RESISTANT POLY(METHYL METHACRYLATE). MODEL AND APPLIED ASPECTS. Polym J 2021. [DOI: 10.15407/polymerj.43.04.251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Based on the experimental data on the rheology of dispersions of hydrophobic aerosil (Am) in a low molecular weight hydrocarbon medium, the possibility of using a «micellar» mechanism for the formation of a bulk structure for such dispersions is considered. A model of such a structure before, during and after shear deformation is proposed, which makes it possible to interpret experimental data on the rheology of dispersed systems. The results of the study of rheokinetics are presented in a new visio – from the point of view of self-organization under the influence of the shear field. The PMMA–PU–Am system was considered as a polymer composite (PC), in which the matrix is the poly(methyl methacrylate) (PMMA) being modified, and the dispersed phase is a mixture of polyurethane (PU) with Am. It has been shown that during the reaction formation of this composition, the conditions of shear deformation of the system correspond to those at which self-organization and fixation of the coagulation rheopex structure of the nanofiller in PC is possible at the moment of reaching very high viscosity values (gel-point), when diffusion processes will be practically frozen. Two concentration regions of Am were predicted (before and after the percolation threshold), where an enhancement of the mechanical characteristics of PMMA can be expected. The relationship between the rheokinetics of the formation of a linear PMMA–crosslinked PU mixture in the presence of different amounts of oligomeric azo-initiator containing fragments of the polyurethane chain and groups capable of initiating radical polymerization of methyl methacrylate and the process of phase separation, morphology and mechanical properties of the final products has been established. It was shown that the time of phase separation and gelation are interrelated and there is in a simple dependence on the concentration of the azo-initiator. Such an initiator affects the structural-rheological transitions in the system and leads to the formation of morphology with smaller domains. The most stable system with the best dispersion of polyurethane in polymethyl methacrylate is a mixture containing 0.002 mol/L of azo-initiator, which has improved mechanical properties and increased impact viscosity.
Collapse
|
2
|
IGNATOVA T, KOSYANCHUK L. FEATURES OF IN SITU FORMATION OF MIXTURES OF LINEAR POLYMERS. Polym J 2021. [DOI: 10.15407/polymerj.43.04.280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This article is devoted to the analysis of the results of the investigation of the process of forming mixtures of linear polymers formed simultaneously in situ according to different mechanisms. The first mechanism is polyaddition, the second mechanism is radical polymerization. This is one of the possible ways to obtain multicomponent polymer systems. The kinetics of chemical reactions of the formation of components and the phase separation which accompanies these reactions were studied for mixtures of poly(methyl methacrylate) (PMMA) with two polyurethanes (PU) of different chemical nature of both flexible and rigid blocks. PU-1 was synthesized from macrodiisocyanate based on oligo(tetramethylene glycol) with molecular mass 1000 g·mol–1 and hexamethylene diisocyanate taken in the molar ratio 1 : 2 using diethylene glycol as a chain extender. PU-2 was synthesized from macrodiisocyanate based on olygo(propylene glycol) with molecular mass 1000 g·mol–1 and toluylene diisocyanate taken in the molar ratio 1 : 2 using butanediol as a chain extender. The mixture of polystyrene (PS) with PU-2 was studied too. It is established that regardless of the chemical nature of the components, the process of in situ mixture formation is subject to general laws. In particular, the change in the chemical nature of the component formed by the mechanism of polyaddition (mixtures PMMA/PU-1 and PMMA/PU-2) or of the component formed by radical polymerization (mixtures PMMA/PU-2 and PS/PU-2) does not affect the nature of the dependence of the conversion degree of components and the fraction of formed polymers at the beginning of the phase separation on the composition of the initial reaction mixtures. Only the absolute values of these parameters change due to different reactivity and different thermodynamic compatibility of the mixed components.
Collapse
|
3
|
Luo H, Chi H, Tao Y, Li J, Liu Z, Hu H. The effect of phase separation on crystallization of polyethylene/poly(ethylene-alt-propylene) blend. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02482-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
4
|
Kobayashi S, Nomura K, Ougizawa T. Structure Development via Reaction-Induced Phase Separation in Polymer Mixtures: Analysis of Early- and Late-Stage Demixing and Computer Simulations at Non-Isoquench Depths. J MACROMOL SCI B 2016. [DOI: 10.1080/00222348.2016.1138180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
5
|
Szymański JK, Pérez-Mercader J. Direct optical observations of vesicular self-assembly in large-scale polymeric structures during photocontrolled biphasic polymerization. Polym Chem 2016. [DOI: 10.1039/c6py01497f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
In this report, we employ a photo-controlled polymerization protocol featuring a fluorescent initiator to follow the evolution of the generated self-assembled microscopic structures in a phase-separating dispersion polymerization medium.
Collapse
Affiliation(s)
- Jan K. Szymański
- Department of Earth and Planetary Sciences and Origins of Life Initiative
- Harvard University
- Cambridge
- USA
| | - Juan Pérez-Mercader
- Department of Earth and Planetary Sciences and Origins of Life Initiative
- Harvard University
- Cambridge
- USA
- Santa Fe Institute
| |
Collapse
|
6
|
Shumskii VF, Kosyanchuk LF, Ignatova TD, Getmanchuk IP, Grishchenko VK, Bus’ko NA, Antonenko OI, Babich OV. Rheokinetics of the in situ formation of a poly(methyl methacrylate)–polyurethane blend in the presence of an oligomeric initiator of polymerization: Morphology and mechanical properties of the final reaction products. POLYMER SCIENCE SERIES B 2015. [DOI: 10.1134/s1560090415050152] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
7
|
Hara A, Inoue R, Takahashi N, Nishida K, Kanaya T. Trajectory of Critical Point in Polymerization-Induced Phase Separation of Epoxy/Oligoethylene Glycol Solutions. Macromolecules 2014. [DOI: 10.1021/ma5009258] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ayana Hara
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto-fu 611-0011, Japan
| | - Rintaro Inoue
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto-fu 611-0011, Japan
| | - Nobuaki Takahashi
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto-fu 611-0011, Japan
| | - Koji Nishida
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto-fu 611-0011, Japan
| | - Toshiji Kanaya
- Institute
for Chemical Research, Kyoto University, Uji, Kyoto-fu 611-0011, Japan
| |
Collapse
|
8
|
Kosyanchuk LF, Ignatova TD, Grishchenko VK, Bus’ko NA, Antonenko OI, Babich OV, Sil’chenko YA, Maslak YV, Shumskii VF. Features of the in situ formation of a linear poly(methyl methacrylate)-crosslinked polyurethane blend in the presence of an oligomeric initiator. POLYMER SCIENCE SERIES A 2014. [DOI: 10.1134/s0965545x14020072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
9
|
Chen FH, Zhang Y, Shi WC, Yang SY, Zhao XJ, Han CC. CURING AGENT INFLUENCE ON THE LAYERED-STRUCTURE FORMATION IN THE EPOXY/POLYSULFONE BLENDS. ACTA POLYM SIN 2012. [DOI: 10.3724/sp.j.1105.2012.11296] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
10
|
Zhang Y, Chen F, Shi W, Liang Y, Han CC. Layered structure formation in the reaction-induced phase separation of epoxy/polysulfone blends. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.10.027] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
11
|
|
12
|
Wang X, Okada M, Han CC. Viscoelastic Phase Separation Induced by Polymerization of n-Butyl Methacrylate in the Presence of Poly(dimethylsiloxane-co-diphenylsiloxane). Macromolecules 2006. [DOI: 10.1021/ma060491t] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xin Wang
- Beijing National Laboratory for Molecular Sciences, Joint Laboratory of Polymer Science and Materials, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Haidian, Beijing, 100080, P. R. China, and Graduate School of Chinese Academy of Sciences, Zhongguancun, Haidian, Beijing, 100080, P. R. China
| | - Mamoru Okada
- Beijing National Laboratory for Molecular Sciences, Joint Laboratory of Polymer Science and Materials, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Haidian, Beijing, 100080, P. R. China, and Graduate School of Chinese Academy of Sciences, Zhongguancun, Haidian, Beijing, 100080, P. R. China
| | - Charles C. Han
- Beijing National Laboratory for Molecular Sciences, Joint Laboratory of Polymer Science and Materials, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Haidian, Beijing, 100080, P. R. China, and Graduate School of Chinese Academy of Sciences, Zhongguancun, Haidian, Beijing, 100080, P. R. China
| |
Collapse
|
13
|
Ishino S, Nakanishi H, Norisuye T, Tran-Cong-Miyata Q, Awatsuji Y. Designing a Polymer Blend with Phase Separation Tunable by Visible Light for Computer-Assisted Irradiation Experiments. Macromol Rapid Commun 2006. [DOI: 10.1002/marc.200600076] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
14
|
Okada M, Inoue G, Ikegami T, Kimura K, Furukawa H. Composition dependence of polymerization-induced phase separation of 2-chlorostyrene/polystyrene mixtures. POLYMER 2004. [DOI: 10.1016/j.polymer.2004.03.086] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|