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	2014/11
形態種別	学術雑誌
査読	査読あり
標題	Semi-Interpenetrating Polymer Networks Composed of Diisocyanate-Bridged 4-Arm Star-Shaped L-Lactide Oligomers and Poly(epsilon-caprolactone)
執筆形態	共著
掲載誌名	Journal of Polymer Science Part B: Polymer Physics
掲載区分	国外
出版社・発行元	Wiley
巻・号・頁	52(21),pp.1420-1428
著者・共著者	Hayato Takase, 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 presence of polycaprolactone (PCL). Morphologies, thermal and mechanical properties of the TDI-bridged H4LAOn (TH4LAOn)/PCL semi-IPNs were evaluated by comparing with those of poly(L-lactide) (PLA)/PCL blends. Compatibility between the two components of the TH4LAOn/PCL semi-IPN with a PCL content not more than 50 wt% was much better than those of the PLA/PCL blends with the same PCL content. All the TH4LAOn networks were substantially amorphous and their tan delta peak or Tgs increased with decreasing n value. Most of the semi-IPNs did not show clear Tg related to both the components. Tensile toughnesses and elongations at break for all the TH4LAOn/PCL semi-IPNs were much higher than those for the PLA/PCL blends with the same PCL content.
DOI	10.1002/polb.23581
ISSN	0887-6266