シバタ　ミツヒロ   SHIBATA MITSUHIRO   柴田　充弘    所属   千葉工業大学  工学部 応用化学科    千葉工業大学  工学研究科 工学専攻    千葉工業大学  工学研究科 応用化学専攻    職種   教授
言語種別	英語
発行・発表の年月	2014/10
形態種別	学術雑誌
査読	査読あり
標題	Polymer networks prepared from 4-arm star-shaped L-lactide oligomers with different arm lengths and their semi-interpenetrating polymer networks containing poly(L-lactide)
執筆形態	共著
掲載誌名	Journal of Polymer Research
掲載区分	国外
出版社・発行元	Springer
巻・号・頁	21(11),pp.592(1)-592(10)
著者・共著者	Hayato Takase, Kyoko Morita, Ayaka Shibita, Mitsuhiro Shibata
概要	Semi-IPNs were prepared by reactions of 2,4-tolylene diisocyanate (TDI) and hydroxy-terminated 4-arm star-shaped L-lactide oligomers (H4LAOn's) with the degrees of polymerization of lactate unit per one arm, n = 3, 5 and 10 in the absence and presence of polylatide (PLA), respectively. SEM observation revealed that compatibility becomes better with increasing PLA content and n value. All the TH4LAOn networks were substantially amorphous and their tan delta peak or Tgs increased with decreasing n value. The tan delta peak temperatures of TH4LAO3 and TH4LAO5 were much higher than that of PLA. All the semi-IPNs except for TH4LAO10/PLA 25/75 displayed two tan delta peaks related to TH4LAOn and PLA. TH4LAO3/PLA 75/25 exhibited a much higher E' at around 50-90 degree C than PLA. TH4LAO5 had the highest tensile strength, modulus and toughness among the TH4LAOn's, while the semi-IPNs did not exhibit much better tensile properties than PLA did.
DOI	10.1007/s10965-014-0592-3
ISSN	1022-9760