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Transcrystalline Morphology of an in situ Microfibrillar Poly(ethylene terephthalate)/Poly(propylene) Blend Fabricated through a Slit Extrusion Hot Stretching‐Quenching Process
Author(s) -
Li ZhongMing,
Li LiangBin,
Shen KaiZhi,
Yang Wei,
Huang Rui,
Yang MingBo
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200300086
Subject(s) - materials science , extrusion , composite material , quenching (fluorescence) , polymer blend , morphology (biology) , fiber , microfiber , melt spinning , nucleation , polyethylene terephthalate , synthetic fiber , polymer , polymer chemistry , copolymer , optics , thermodynamics , physics , biology , fluorescence , genetics
Summary: Isotactic poly(propylene) (iPP) transcrystallites are obtained in in situ microfibrillar polyethylene terephthalate (PET)/iPP blends during a slit extrusion‐hot stretching‐quenching process. Based on morphological information from X‐ray scattering and microscopy, three nucleation origins are proposed in microfibrillar reinforced blends under an elongational flow field: (a) the classical row nuclei model; (b) fiber nuclei; (c) nuclei induced by fiber assistant alignment. The last model provides a natural explanation for the case that transcrystallites only occur in some microfiber reinforced blends under flow rather than without the external field.AFM image for the transcrystalline layer of the microfibrillar blend.