Morphology, rheological and crystallization behavior in thermoplastic polyurethane toughed poly(l-lactide) with stereocomplex crystallites
作者： Yu-Dong Shi , Yue-Hong Cheng , Yi-Fu Chen , Kai Zhang , Jian-Bing Zeng
DOI: 10.1016/J.POLYMERTESTING.2017.06.013
关键词:
摘要: Abstract Melt-blending poly( l -lactide) (PLLA) with elastomers has been well demonstrated to improve toughness of PLLA. Here, we show a d (PDLA) grafted thermoplastic polyurethane (TPU) (TPU-g-PDLA) toughed PLLA simultaneous formation few amount stereocomplex crystallites (SCs) which exhibited higher efficient toughening than that TPU. The TPU-g-PDLA was prepared by the in-situ melt-reaction TPU and PDLA 4, 4’-diphenylmethane diisocyanate (MDI). A comparative study on morphology, rheological crystallization behavior also carried in PLLA/TPU, PLLA/TPU-g-PDLA PLLA/TPU/PDLA samples. samples highest rate, complex viscosity, impact strength tensile among samples, indicating interfacial interaction between Furthermore, chains were thought break intermolecular rapid its increase crystallinity.
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