Investigation of polycyanurate/benzoxazine curing system

Fu, Mao‐Chun; Uno, Takaaki; Ueda, Mitsuru; Higashihara, Tomoya

doi:10.1007/s00542-017-3347-3

Cited by 2 publications

(4 citation statements)

References 11 publications

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“…Yield: 55% (0.6 g, purity~90%). 1 In order to obtain BpyPDMS-MeCl 2 , 0.1 g (2.8 × 10 −5 M) bpyPDMS was dissolved in 10 mL of toluene and left overnight. Then, 30 µL (9.3 × 10 −6 M) aliquot of methanol solution containing MeCl 2 salt (Me: Mn 2+ , Fe 2+ , Ni 2+ , and Zn 2+ , all received from Tokyo Chemical Industry) was subsequently added to the bpyPDMS solution, to obtain PDMS cross-linking by metal-ligand coordination with 1:3 metal:ligand coordination stoichiometry [25].…”

Section: Methodsmentioning

confidence: 99%

“…Nowadays, flexible organic electronics hold a great potential in "next generation" applications, such as foldaway displays [1,2], wearable printable electronics [3][4][5], advanced biomedical sensors [3,6,7], communication technology [8,9], and virtual reality devices. Its unique combination of properties, such as flexibility, light weight, potential biodegradability, elasticity, and ductility with a possibility of production by means of cheap, solution-based techniques like spin-coating and printing, generated the tremendous attention of scientist and engineer communities [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Metal-Ligand Coordination Complexes on Molecular Dynamics and Structure of Cross-Linked Poly(dimethylosiloxane)

et al. 2020

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Poly(dimethylosiloxane) (PDMS) cross-linked by metal-ligand coordination has a potential functionality for electronic devices applications. In this work, the molecular dynamics of bipyridine (bpy)–PDMS-MeCl2 (Me: Mn2+, Fe2+, Ni2+, and Zn2+) are investigated by means of broadband dielectric spectroscopy and supported by differential scanning calorimetry and density functional theory calculations. The study of molecular motions covered a broad range of temperatures and frequencies and was performed for the first time for metal-ligand cross-linked PDMS. It was found that the incorporation of bpy moieties into PDMS chain prevents its crystallization. The dielectric permittivity of studied organometallic systems was elevated and almost two times higher (ε′ ~4 at 1 MHz) than in neat PDMS. BpyPDMS-MeCl2 complexes exhibit slightly higher glass transition temperature and fragility as compared to a neat PDMS. Two segmental type relaxations (α and αac) were observed in dielectric studies, and their origin was discussed in relation to the molecular structure of investigated complexes. The αac relaxation was observed for the first time in amorphous metal-ligand complexes. It originates from the lower mobility of PDMS polymer chains, which are immobilized by metal-ligand coordination centers via bipyridine moieties.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Metal-Ligand Coordination Complexes on Molecular Dynamics and Structure of Cross-Linked Poly(dimethylosiloxane)

et al. 2020

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“…Despite having 5-and 7-methoxy isomers in the same molecule, 5,7 -MOPH-ddm shows a symmetric and rather sharp exothermic peak at 226 • C, and this phenomenon is explained using the rate of reaction theory. Besides classical linkages formed by oxazine ROP, formation of other types of crosslinks such as ester linkages due to copolymerization, [168] triazine ester/isocyanurate [169] are also reported. Introduction of such additional linkages in PBz is advantageous and found to increase T g of PBz.…”

Section: Multiple Polymerization Mechanismsmentioning

confidence: 97%

“…Besides classical linkages formed by oxazine ROP, formation of other types of crosslinks such as ester linkages due to copolymerization, [ 168 ] triazine ester/isocyanurate [ 169 ] are also reported. Introduction of such additional linkages in PBz is advantageous and found to increase T g of PBz.…”

Section: Classification Of Benzoxazine Monomersmentioning

confidence: 99%

Review on the Accelerated and Low-Temperature Polymerization of Benzoxazine Resins: Addition Polymerizable Sustainable Polymers

et al. 2021

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Due to their outstanding and versatile properties, polybenzoxazines have quickly occupied a great niche of applications. Developing the ability to polymerize benzoxazine resin at lower temperatures than the current capability is essential in taking advantage of these exceptional properties and remains to be most challenging subject in the field. The current review is classified into several parts to achieve this goal. In this review, fundamentals on the synthesis and evolution of structure, which led to classification of PBz in different generations, are discussed. Classifications of PBzs are defined depending on building block as well as how structure is evolved and property obtained. Progress on the utility of biobased feedstocks from various bio-/waste-mass is also discussed and compared, wherever possible. The second part of review discusses the probable polymerization mechanism proposed for the ring-opening reactions. This is complementary to the third section, where the effect of catalysts/initiators has on triggering polymerization at low temperature is discussed extensively. The role of additional functionalities in influencing the temperature of polymerization is also discussed. There has been a shift in paradigm beyond the lowering of ring-opening polymerization (ROP) temperature and other areas of interest, such as adaptation of molecular functionality with simultaneous improvement of properties.

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Investigation of polycyanurate/benzoxazine curing system

Cited by 2 publications

References 11 publications

Effect of Metal-Ligand Coordination Complexes on Molecular Dynamics and Structure of Cross-Linked Poly(dimethylosiloxane)

Effect of Metal-Ligand Coordination Complexes on Molecular Dynamics and Structure of Cross-Linked Poly(dimethylosiloxane)

Review on the Accelerated and Low-Temperature Polymerization of Benzoxazine Resins: Addition Polymerizable Sustainable Polymers

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