フルテキストURL fulltext.pdf
著者 Kobayashi, Keiko| Atarashi, Hironori| Yamazaki, Shinichi| Kimura, Kunio|
備考 The version of record of this article, first published in Polymer Journal, is available online at Publisher’s website: http://dx.doi.org/10.1038/s41428-023-00833-1|
発行日 2023-08-18
出版物タイトル Polymer Journal
55巻
12号
出版者 Springer Science and Business Media LLC
開始ページ 1393
終了ページ 1398
ISSN 0032-3896
NCID AA00777013
資料タイプ 学術雑誌論文
言語 英語
OAI-PMH Set 岡山大学
著作権者 © The Author(s) 2023.
論文のバージョン publisher
DOI 10.1038/s41428-023-00833-1
Web of Science KeyUT 001050641100001
関連URL isVersionOf https://doi.org/10.1038/s41428-023-00833-1
著者 木村 邦生|
発行日 2001-08
出版物タイトル 環境制御
23巻
資料タイプ その他
JaLCDOI 10.18926/fest/11649
タイトル(別表記) Morphology Control of Aromatic Polymers during Polymerization
フルテキストURL 001_221_227.pdf
著者 山下 祐彦| 木村 邦生| 次田 浩二| 横山 文義|
抄録 Morphology and formation mechanism of poly (4'-oxy-4-biphenylcarbonyl) (POBP) crystals obtained by solution polymerization were firstly treated. It was concluded that the formation mechanism of the bundlelike aggregates of fibrillar crystals in POBP was fundamentally simillar to that in POB whiskers. Secondly the copolymerization effects of m-acetoxybenzoic acid and 4-(4-acetoxyphenyl) benzoic acid on the morphology of POB whiskers were studied. The experimental results strongly supported our proposal for the formation mechanism of whiskers which was consisted of crystallization of oligomers with a critical length as lamellae from solution and solid state polymerizationof oligomers between lamellae. Finally, the formation mechanism of poly (p-oxycinnamoyl) spherical products during solution polymerization was treated. The formation of these spherical products could be understood by overlapped phase diagram of melting depression curve and consolute curve of oligomers-solvent system.
キーワード morphology control aromatic polymers phase separation polymer whisker polymer beads rigid rod polymers
出版物タイトル 岡山大学環境理工学部研究報告
発行日 1996-03
1巻
1号
開始ページ 221
終了ページ 227
ISSN 1341-9099
言語 日本語
論文のバージョン publisher
NAID 120002313893
JaLCDOI 10.18926/fest/11482
フルテキストURL 011_093_097.pdf
著者 木村 邦生| 山崎 慎一| Cassidy Patrick E.| Fitch John W| Venumbaka Sreenu R.|
抄録 Fluorine-containing poly(ether ketone)s was synthesized by the nucleophilic aromatic substitution reaction of 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoropropane and 4,4'-bis(2,3,4,5,6-pentafluorobenzoyl) diphenyl ether in super-critical CO(2). Polymerizations were carried out at 80℃ for 6 hours under 5000 psi of CO(2) pressure, which was super-critical phase. Polymerization concentration was 0.5 g of polymer in 10 - 12 mL of CO(2). The polymer was not obtained in CO(2) due to the insolubility of both the potassium bisphenoxide and the polymer into CO(2). However, the polymer was formed by an addition of DMAc and NMP in CO(2), even though molecular weight was not so high. Very small amount of co-solvents which were immiscible with CO(2) was effective, and it was 1/20 - 1/25 amount of the solvent used in the conventional poly(ether ketone) synthesis. The polymerization mechanism was also discussed.
キーワード super-critical carbon dioxide plastics high performance environmentally benign
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2006-03-15
11巻
1号
開始ページ 93
終了ページ 97
ISSN 1341-9099
言語 英語
論文のバージョン publisher
NAID 120002313564
JaLCDOI 10.18926/fest/11477
タイトル(別表記) Efficient Chain Extension Reaction of Poly (butylene terephthalate) by using Crystallization
フルテキストURL 012_167_171.pdf
著者 井原 誠司| 城間 弥| 山崎 慎一| 木村 邦生|
抄録 Plastics are quite important materials for not only industrial usages but also our daily life. Many plastics are difficult to reuse because they are susceptible to UV, hydrolysis and so on leading to the reduction of molecular weight. Among them, poly (butylenes terephthalate) (PBT) is a valuable materials prepared by polycondensation reaction, and PBT has the same limitation to reuse. Hence, efficient chain extension reaction for recovered PBT has been needed to improve the properties damaged by chain scission. In this study, new chain extension reaction had been examined by using crystallization as pre-treatment. Isothermal crystallization at 161℃ concentrated the chain end-groups on the surface of the crystals, and chain extension reaction at 210℃, which was lower than the melting temperature of PBT, enhanced the molecular weight significantly compared with the reaction over the melting temperature. It concluded that the pre-treatment of crystallization was favorable for the efficient chain extension reaction and this result provided the new technology for the effective reuse of the plastics.
キーワード Polyester material recycle crystallization chain extension reaction
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2007-03-15
12巻
1号
開始ページ 167
終了ページ 171
ISSN 1341-9099
言語 日本語
論文のバージョン publisher
NAID 120002314029
JaLCDOI 10.18926/fest/11473
タイトル(別表記) Acceleration of Formation of Shish under Flow by Addition of Irregular Shaped Particles
フルテキストURL 012_157_160.pdf
著者 山崎 慎一| 若林 完爾| 水間 健太| 木村 邦生|
抄録 We have shown that the shish was formed from the oriented melt composed of the elongated chains caused by dust particles within the melt via bundle typed nucleation under flow with low shear rate (γ=5s(-1)). This implies that dust particles effectively cause the elongation of chains within the melt. In this work, we observed the crystallization of polypropylene added with irregular shaped particles under shear flow by means of polarizing optical microscope. We prepared various shaped particles such as confetti-like, spherical and rock-like. We found that the size and asymmetric shape of additive particles play an important role for the acceleration of formation of shish.
キーワード shish crystallization polypropylene shear flow elongation injection molding
出版物タイトル 岡山大学環境理工学部研究報告
発行日 2007-03-15
12巻
1号
開始ページ 157
終了ページ 160
ISSN 1341-9099
言語 日本語
論文のバージョン publisher
NAID 120002313610