Presentations -

Synthesis and chemical recycling of polythioester using an enzyme

MATSUMURA SHUICHI

[International presentation]  GSC-AON2007 1st Asian-Oceanian Conference on Green and Sustainable Chemistry and 7th Green and Sustainable Chemistry Symposium (東京、学術総合センター) , 

2007.03

, 

Poster presentation

Synthesis and properties of biodegradable cationic surfactants having carbonate linkages

MATSUMURA SHUICHI

[International presentation]  GSC-AON2007 1st Asian-Oceanian Conference on Green and Sustainable Chemistry and 7th Green and Sustainable Chemistry Symposium (東京、学術総合センター) , 

2007.03

, 

Poster presentation

Cell encapsulation and degradation properties of a novel hydrogel based on cyclic acetal and PEG

S. Kaihara MATSUMURA SHUICHI J. P. Fisher

[International presentation]  Annual BMES Meeting (Los Angeles, CA, USA) , 

2007.03

, 

Poster presentation, BMES

バイオ由来資源のリサイクル

MATSUMURA SHUICHI

[Domestic presentation]  プラスチック成形加工学会　第９５回講演会 (タワーホール船堀) , 

2007.01

, 

Oral presentation (invited, special), プラスチック成形加工学会

Synthesis and chemical recycling of green polyesters using environmentally benign catalyst

MATSUMURA SHUICHI

[International presentation]  The 2nd International Conference of Technology and Application of Biodegradable and Biobased Plastics (ICTABP2) (Hangzhou, China) , 

2006.10

, 

Oral presentation (invited, special)

　View Summary

The greening of chemistry in the field of polymer science may include the design and synthesis of chemically recyclable and biodegradable plastics using renewable resources, and the application of environmentally benign catalysts. In this report, enzyme-catalyzed synthesis and degradation of diol-diacid type plastics, such as poly(butylene succinate) (PBS), poly(butylene adipate) (PBA) and poly(hexylene fumarate) (PHF), were studied with respect to the establishment of sustainable polymer production and chemical recycling system. As an application of this enzymatic chemical recycling of PBS, the selective chemical recycling of poly(lactic acid) (PLLA)-based polymer blend, PLLA/PBS, using an enzyme and a clay catalyst was reported.

カーボネート結合を有する新規カチオン性グリーンサーファクタントの合成と性質

MATSUMURA SHUICHI

[Domestic presentation]  第４５回日本油化学会年会 (千葉県野田市、東京理科大野田キャンパス) , 

2006.10

, 

Oral presentation (general), 日本油化学会

Synthesis and properties of novel biomaterials based on cyclic acetal

S. Kaihara, P. Modi, K. Toshima, J.P. Fisher MATSUMURA SHUICHI

[International presentation]  IUPAC International Symposium on Advanced Polymers for Emerging Technologies, (Pusan, Korea) , 

2006.10

, 

Poster presentation, IUPAC

環状アセタールを基本骨格とした新規ゲルの創製と生体適合材料としての機能評価

MATSUMURA SHUICHI

[Domestic presentation]  第５５回高分子討論会 (富山大学) , 

2006.09

, 

Oral presentation (general), 高分子学会

Enzyme-catalyzed chemical recycling of bio-based polymers

MATSUMURA SHUICHI

[Domestic presentation]  第５５回高分子討論会 (富山大学) , 

2006.09

, 

Oral presentation (general), 高分子学会

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Chemical recycling of bio-based polymers such as poly(butylene adipate) and poly(butylene succinate), were studied using an enzyme. Chemically recyclable bio-based polymers were prepared via the ring-opening polymerization of cyclic oligomers which were produced by the condensation of diols and dicarboxylates by lipase in a toluene solution. The cyclic oligomer was readily polymerized by the same lipase in more concentrated solution to produce a high-molecular weight polyester. The produced polyester was readily degraded by lipase to produce cyclic oligomers as the chemical recycling. In this report, the effect of ring-size of cyclic oligomer was studied with respect to the repolymerizability.

酵素触媒重合による高分子量ポリチオエステルの合成と物性

MATSUMURA SHUICHI

[Domestic presentation]  第５５回高分子討論会 (富山大学) , 

2006.09

, 

Oral presentation (general), 高分子学会

Enzymatic synthesis and properties of novel nonionic surfactants containing carbonate linkages

Miho CHUJO, Kazunobu TOSHIMA,MATSUMURA SHUICHI

[Domestic presentation]  第５５回高分子討論会 (富山大学) , 

2006.09

, 

Poster presentation, 高分子学会

　View Summary

Novel nonionic surfactants containing carbonate linkages were synthesized by the two-step reaction of 1-dodecanol and diphenyl carbonate with the subsequent reaction with
tetraethylene glycol using lipase. And their physico-chemical properties and biodegradabilities were measured.

Novel synthesis and properties of polythionoester

Keiko HASHIMOTO, Makoto KATO, Kazunobu TOSHIMA, MATSUMURA SHUICHI

[Domestic presentation]  第５５回高分子討論会 (富山大学) , 

2006.09

, 

Poster presentation, 高分子学会

　View Summary

Aliphatic polythionoesters were prepared by the one-pot thionoesterification of polycaprolactone,
polypentadecanolactone, poly (butylene succinate) and poly (butylene adipate) using diphosphorus pentasulfide
and hexamethyldisiloxane. And their physico-chemical properties as well as enzymatic degradabilities and
chemical recyclabilities were evaluated.

酵素触媒重合によるポリ（エステルーウレタン）の合成と物性

MATSUMURA SHUICHI

[Domestic presentation]  第５５回高分子討論会 (富山大学) , 

2006.09

, 

Poster presentation, 高分子学会

ポリ乳酸のケミカルリサイクルを指向した乳酸オリゴマーの再重合性

MATSUMURA SHUICHI

[Domestic presentation]  第５５回高分子討論会 (富山大学) , 

2006.09

, 

Poster presentation, 高分子学会

Enzyme-catalyzed synthesis and degradation of polyester and polythioester

MATSUMURA SHUICHI, Kato Makoto, Sugihara Satoko, Toshima Kazunobu

[International presentation]  American Chemical Society 232 Fall National Meeting (San Francisco, USA) , 

2006.09

, 

Oral presentation (invited, special), American Chemical Society

　View Summary

Enzyme-catalyzed synthesis and degradation of a typical diol-diacid type plastic, poly(butylene succinate) (PBS), and diol-diacid type polythioester were studied with respect to the establishment of sustainable polymer production and chemical recycling system. A significantly higher-molecular weight polyester was produced via the ring-opening polymerization of the cyclic oligomer. The cyclic oligomer was produced both by the condensation of monomers and degradation of the polyester. Polymer blends of PBS/poly(L-lactic acid) (PLLA) were degraded into repolymerizable oligomers, first by the lipase-catalyzed degradation of PBS into cyclic BS oligomers followed by the degradation of PLLA into lactic acid oligomers by montmorillonite K-5. By the reprecipitation procedures, the PLLA and BS oligomers were completely separated. Aliphatic dithiol-diacid type polythioesters were enzymatically prepared by the direct polycondensation of dithiol and diacid diesters. A higher molecular weight polythioester was produced using lipase in a two-step procedure, i.e., cyclization with subsequent ring-opening polymerization.

リシノール酸バイオベースポリマーのリパーゼ触媒合成と機能評価

MATSUMURA SHUICHI

[Domestic presentation]  第４５回日本油化学会年会 (千葉県野田市、東京理科大野田キャンパス) , 

2006.09

, 

Oral presentation (general), 日本油化学会

Novel enzymatic synthesis and properties of aliphatic polythioester

MATSUMURA SHUICHI,Kato Makoto, Tshima Kazunobu

[International presentation]  10th Annual Green Chemistry & Engineering Conference (Washington, DC, USA) , 

2006.06

, 

Poster presentation, American Chemical Society

　View Summary

Polythioester was enzymatically synthesized by both polycondensation and ring-opening polymerization. The obtained polythioesters showed a higher melting point compared to the corresponding polyoxyesters.

Sustainable chemical recycling of bio-based plastics using environmentally genign catalyst

MATSUMURA SHUICHI

[International presentation]  International Symposium of Polymer Conference (PC 2006) (Dalian, China) , 

2006.06

, 

Oral presentation (invited, special), State Key Laboratory of Polymer Physics and Chemistry, China

A novel biomimetic glycosidation using 2,3-unsaturated sugar as a glycosyl donor

Toshima Kazunobu, Sasaki Kaname, MATSUMURA SHUICHI

[International presentation]  International Symposium on Chemistry, Biology and Medicine (Paphos, Cyprus) , 

2006.05

, 

Poster presentation

乳酸系ポリマーブレンドのケミカルリサイクル

MATSUMURA SHUICHI

[Domestic presentation]  第５５回高分子学会年次大会 (名古屋) , 

2006.05

, 

Poster presentation, 高分子学会