Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Kiyoaki Ishimoto"'
Autor:
Yui Yoshimura, Kiyoaki Ishimoto, Maho Arimoto, Misato Nojiri, Hideki Yamane, Shiro Kobayashi, Yuji Aso, Hitomi Ohara
Publikováno v:
Polymer. 90:342-350
A new and simple method of one-pot two-stage poly(lactic acid) (PLA) macromonomer synthesis has been developed. The first stage of the reaction is a direct polycondensation of lactic acid (LA) without a catalyst to PLA, and the second stage is a ring
Autor:
Sumonman Niamlang, Weraporn Pivsa-Art, Hitomi Ohara, Nutchapon Santipatee, Sommai Pivsa-Art, Kiyoaki Ishimoto, Tossamon Wongborh, Sorapong Pavasupree
Publikováno v:
The International Journal of Advanced Culture Technology. 3:100-109
Environmental problems from petroleum-based plastic wastes have been rapidly increasing in recent years. The alternative solution is focus on the development of environmental friendly plastic derived from renewable resource. Poly(lactic acid) (PLA) i
Autor:
Hitomi Ohara, Chieko Narita, Kiyoaki Ishimoto, Kamthorn Intharapichai, Yuma Furukawa, Yoko Okahisa
Publikováno v:
Carbohydrate polymers. 198
Cellulose nanofibers (CNFs) were obtained from three types of oil palm wastes, mesocarp, empty fruit bunch (EFB), and palm kernel shell (PKS), as well as the trunk of the oil palm tree, to compare their morphological, thermal, and mechanical properti
Autor:
Kiyoaki Ishimoto, Shiro Kobayashi, Naoya Yabuuchi, Maho Arimoto, Hirofumi Yamashita, Hitomi Ohara, Koji Morita, Masahiko Ishii
Publikováno v:
Progress in Organic Coatings. 78:183-187
For improvement of anti-hydrolysis performance, we evaluated humidity resistance of cured coating films of acrylic polyols with pendant poly(lactic acid)s. The cured films containing 50 wt% poly(lactic acid)s showed similar humidity resistance compar
Autor:
Shiro Kobayashi, Hitomi Ohara, Koji Morita, Tomoya Okuda, Yuji Aso, Kiyoaki Ishimoto, Naoya Yabuuchi, Syuhei Yamaguchi, Masahiko Ishii, Hirofumi Yamashita, Maho Arimoto
Publikováno v:
Biomacromolecules. 13:3757-3768
For developing broader application of biobased polymers, graft copolymers and comb polymers having poly(lactic acid) (PLA) side chains have been synthesized by using a macromonomer technique. PLA macromonomers (MMm) having a methacryloyl polymerizabl
Publikováno v:
Macromolecules. 45:4166-4174
This paper reports a new synthesis of biobased polymers by using itaconic anhydride (IAn) and lactic acid (LA) as renewable starting materials. Poly(lactic acid) (PLA)-graft copolymers were synthesized via two approaches. First, the macromonomer appr
Autor:
Sorapong Pavasupree, Weraporn Pivsa-Art, Sumonman Niamlang, Hitomi Ohara, Sommai Pivsa Art, Kiyoaki Ishimoto
Publikováno v:
Advanced Materials Research. :1301-1306
Synthesis of poly(L-lactic acid), PLLA, in a mass scale production using 2-steps direct polycondensation methods was investigated. One hundred kilogram of L-lactic acid was esterified in a designed reactor under reduced pressure at elevated temperatu
Autor:
Hideki Yamane, Atsushi Hamada, Kiyoaki Ishimoto, Hitomi Ohara, Koki Onda, Yutaka Kawahara, Hiroshi Mitomo
Publikováno v:
Sen'i Gakkaishi. 66:120-123
Poly(lactic acid) (PLA) was blended with baked shell powder increasing the content up to 10wt%, and the influence of mixing the powder on the physical properties of the obtained PLA compounds were investigated. The measurements for storage modulus E'
Autor:
Hitomi Ohara, Shiro Kobayashi, Masahiko Ishii, Hirofumi Yamashita, Naoya Yabuuchi, Maho Arimoto, Kouji Morita, Kiyoaki Ishimoto
Publikováno v:
Biomacromolecules. 10:2719-2723
To broaden the application scope of lactic acid polymers, a new miniemulsion of poly(alkyl methacrylate-graft-lactic acid)s has been developed. The graft copolymer synthesis was based on a poly(lactic acid) macromonomer having a methacryloyl polymeri
Autor:
Keiichiro Nomura, Yuji Aso, Kazunori Fujii, Weraporn Pivsa-Art, Hitomi Ohara, Sommai Pivsa-Art, Kiyoaki Ishimoto, Hideki Yamane
Publikováno v:
Journal of Applied Polymer Science. 132
Poly(lactic acid) (PLA) is a biobased polymer made from biomass having high mechanical properties for engineering materials applications. However, PLA has certain limited properties such as its brittleness and low heat distortion temperature. Thus, t