Zobrazeno 1 - 10
of 196
pro vyhledávání: '"Yuushou Nakayama"'
Publikováno v:
Catalysts, Vol 14, Iss 7, p 402 (2024)
Whereas the cationic homopolymerization of β-pinene and isobutene (IB) have been extensively studied, their copolymerization is still very scarce, and the conditions under which copolymerization can occur are limited to extremely low temperatures. M
Externí odkaz:
https://doaj.org/article/9d1a62a956af41e494b6f762a7ece133
Publikováno v:
Polymers, Vol 16, Iss 2, p 236 (2024)
Considering the sustainability of material development, coordination polymerization catalysts effective for 1,1-disubstituted olefins are receiving a great deal of attention because they can introduce a variety of plant-derived comonomers, such as β
Externí odkaz:
https://doaj.org/article/80e08169803c44618b2ac61c392fc55b
Publikováno v:
International Journal of Polymer Science, Vol 2023 (2023)
Many catalysts containing various elements at their active sites have been reported for the ring-opening polymerization (ROP) of cyclic esters. However, to our knowledge, silicon-based catalysts for ROP have never been reported. Here we report the RO
Externí odkaz:
https://doaj.org/article/166049ecd53d477398f0023f8f225148
Autor:
Yuushou Nakayama, Keitaro Fukumoto, Yuji Kusu, Ryo Tanaka, Takeshi Shiono, Norioki Kawasaki, Naoko Yamano, Atsuyoshi Nakayama
Publikováno v:
Polymers, Vol 15, Iss 5, p 1155 (2023)
We have previously reported that sequence-controlled copolyesters such as poly((ethylene diglycolate) terephthalate) (poly(GEGT)) showed higher melting temperatures than those of the corresponding random copolymers and high biodegradability in seawat
Externí odkaz:
https://doaj.org/article/8a0c7796ca474b48923f921305305e1a
Publikováno v:
Molecules, Vol 27, Iss 24, p 9007 (2022)
Diene comonomers bearing boronic acid masked with 1,8-diaminonaphthalene (dan) were applied to copolymerization with isoprene or butadiene using neodymium borohydride complex as a catalyst. The comonomers were tolerant to excess modified methylalumin
Externí odkaz:
https://doaj.org/article/0fcd90298f38424ca16989774baff91c
Autor:
Lamya Zahir, Takumitsu Kida, Ryo Tanaka, Yuushou Nakayama, Takeshi Shiono, Norioki Kawasaki, Naoko Yamano, Atsuyoshi Nakayama
Publikováno v:
Life, Vol 11, Iss 1, p 43 (2021)
An innovative type of biodegradable thermoplastic elastomers with improved mechanical properties from very common and potentially renewable sources, poly(L-lactide)-b-poly(2-methyl-1,3-propylene glutarate)-b-poly(L-lactide) (PLA-b-PMPG-b-PLA)s, has b
Externí odkaz:
https://doaj.org/article/aaccc195b73b49a69b2212f2f844800f
Autor:
Yuushou Nakayama, Kazumasa Watanabe, Ryo Tanaka, Takeshi Shiono, Norioki Kawasaki, Naoko Yamano, Atsuyoshi Nakayama
Publikováno v:
International Journal of Molecular Sciences, Vol 21, Iss 10, p 3674 (2020)
Poly(ester amide)s are attracting attention because they potentially have excellent thermal and mechanical properties as well as biodegradability. In this study, we synthesized a series of novel poly(ester amide)s by introducing γ-aminobutyric acid
Externí odkaz:
https://doaj.org/article/b94f769c904849599c128233f074b30a
Publikováno v:
Polymers, Vol 11, Iss 7, p 1100 (2019)
Poly(norbornene-co-styrene)s were synthesized by the use of anilinonaphthoquinone-ligated nickel complexes [Ni(C10H5O2NAr)(Ph)(PPh3): 1a, Ar = C6H3-2,6-iPr; 1b, Ar = C6H2-2,4,6-Me; 1c, Ar = C6H5] activated with modified methylaluminoxane (MMAO) or B(
Externí odkaz:
https://doaj.org/article/87a9512d1c92458fb59b85445b16f283
Autor:
Takeshi Shiono, Yuushou Nakayama
Publikováno v:
Molecules, Vol 10, Iss 6, Pp 620-633 (2005)
This review article describes developments in chiral metallocenes as polymerization catalysts focusing on C2 symmetric ansa-zirconocene complexes. Selective synthesis of rac-isomers of ansa-zirconocenes are surveyed. Isospecific polymerizations of pr
Externí odkaz:
https://doaj.org/article/bb85ad9957434523a39c4e527bfb1450
Publikováno v:
Catalysts, Vol 7, Iss 10, p 284 (2017)
Butadiene polymerization, in both a highly cis- and trans-specific manner, was achieved by using a Cp*Nd(BH4)2(thf)2–Bu2Mg system as an initiator. The cis-/trans- ratio can be tuned by the amount of trialkylaluminum-depleted modified methylaluminox
Externí odkaz:
https://doaj.org/article/98a10affe020457ba5c858e651a2bcf5