Výsledky vyhledávání - "Hiroyuki Hanahata"

Segmented Poly(urethane-urea)s Synthesized Directly from Isocyanate-Terminated Prepolymers and Masked Diamines II. Kinetic and Mechanistic Study on Masking and Demasking Reaction

Autor: Emiko Yamazaki, Yoshiharu Kitahama, Hiroyuki Hanahata

Publikováno v: Polymer Journal. 29:818-825

Segmented Poly(urethane-urea)s Synthesized Directly from Isocyanate-Terminated Prepolymers and Masked Diamines II. Kinetic and Mechanistic Study on Masking and Demasking Reaction

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::33673394b831b9b13e0892c0b90ebdd3
https://doi.org/10.1295/polymj.29.818

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Segmented Poly(urethane-urea)s Synthesized Directly from Isocyanate-Terminated Prepolymers and Masked Diamines I. Quantitative Synthesis

Autor: Hiroyuki Hanahata, Jun-ichi Hiwatari, Emiko Yamazaki, Yoshiharu Kitahama

Publikováno v: Polymer Journal. 29:811-817

An attempt was made for quantitative synthesis of segmented poly(urethane-urea)s (PUUs), not via solution state, but directly from an isocyanate-terminated prepolymer prepared from an excess molar concentration of 4,4′-methylenediphenyldiisocyanate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c20125879dda38b78e957f86f1328007
https://doi.org/10.1295/polymj.29.811

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Segmented Poly(urethane-urea)s Synthesized Directly from Isocyanate-Terminated Prepolymers and Masked Diamines III. Kinetic and Mechanistic Study on Polymerization Reactions

Autor: Hiroyuki Hanahata, Emiko Yamazaki, Jun-ichi Hiwatari, Yoshiharu Kitahama

Publikováno v: Polymer Journal. 29:826-835

The direct synthesis of segmented poly(urethane-urea)s (DSPUU) from an isocyanate-terminated prepolymer (ITPP) and reaction products (AE) from acetone and ethylenediamine consisting of N-isopropylideneethylenediamine (1), N,N′-diisopropylideneethyl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4d6fb956d118df333d4c9a61c5a5daba
https://doi.org/10.1295/polymj.29.826

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Mechanism of a Chain-Extending Reaction in the Synthesis of Segmented Poly(urethane–urea) Using Blocked Ethylenediamine

Autor: Hiroyuki Hanahata, Kunihiko Okajima, Yasuhiro Nakano, Emiko Yamazaki, Yoshiharu Kitahama

Publikováno v: Bulletin of the Chemical Society of Japan. 70:1185-1192

An attempt was made to clarify the mechanism of a chain-extending reaction of NCO-terminated prepolymers in the synthesis of segmented poly(urethane–urea) using blocked ethylenediamine (EDA) with acetone (ACE). For this purpose, an ACE/EDA mixture

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16e5723507ecec44f544c9bb67287b54
https://doi.org/10.1246/bcsj.70.1185

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Capillary flow properties and dissolved state of segmented poly(urethane-urea)/N,N-dimethylacetamide solution as a function of temperature

Autor: Hiroyuki Hanahata, Akiko Nakashima, Yasuhiro Nakano, Kunihiko Okajima

Publikováno v: Polymer. 38:817-825

Capillary flow properties of a concentrated N,N -dimethylacetamide (DMAc) solution of segmented poly(urethane-urea) (PUR) prepared from 4,4′-diphenylmethanediisocyanate (MDI), polytetramethlyleneoxide (PTMO), and ethylenediamine (EDA) (polymer conc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::19799f8e11a628dd4a5c677fd58929d5
https://doi.org/10.1016/s0032-3861(96)00590-3

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Phase Separation Structure of Poly(urethane-urea)s Prepared from Different Manufacturing Methods

Autor: Kunihiko Okajima, Emiko Yamazaki, Hiroyuki Hanahata

Publikováno v: Polymer Journal. 28:1017-1020

Phase Separation Structure of Poly(urethane-urea)s Prepared from Different Manufacturing Methods

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a96eaef2b9c363a45759ff3bc57e9bb0
https://doi.org/10.1295/polymj.28.1017

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Monomer sequence length distributions of hard segments of linear segmented poly(urethane–urea)s 2: computer simulation by the Monte Carlo method

Autor: Hiroyuki Hanahata, Kenji Kamide

Publikováno v: Polymer International. 38:287-298

An attempt was made to calculate, by the Monte Carlo method, monomer sequence length distributions of the hard segment (MSLDH) within a linear segmented poly(urethane-urea) (PUR) synthesised by the prepolymer method in which an isocyanate-terminated

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::62f4ac200033c7eaa759ecbe4d01acea
https://doi.org/10.1002/pi.1995.210380311

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Monomer sequence length distributions of hard segments of linear segmented poly(urethane–urea)s 1: chromatographic study

Autor: Kenji Kamide, Hiroyuki Hanahata

Publikováno v: Polymer International. 38:277-286

An attempt was made to determine, by the chromatographic method, monomer sequence length distributions of the hard segments in segmented poly(urethane-urea)s (PURs) synthesised in a two-step process : (1) a prepolymer formation reaction of an excess

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6dec1d605a980c750a26c2bb8c93fdea
https://doi.org/10.1002/pi.1995.210380310

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Formation of cross-links during prepolymerisation reaction of methylene-bis (4-phenylisocyanate) with poly (tetramethyleneoxide) inN,N-Dimethylacetamide

Autor: Kenji Kamide, Hiroyuki Hanahata

Publikováno v: Polymer International. 31:131-143

An attempt was made to investigate the cross-linking reaction which occurs as a side reaction when an excess of methylene-bis(4-phenylisocyanate) (MDI) is reacted with polytetramethyleneoxide (PTMO) (number-average molecular weight 2010) in N,N-dimet

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::230dfbbe0abb95c69d8b69d6e8277f9b
https://doi.org/10.1002/pi.4990310204

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