A TEM study on melt-crystallized poly(butylene terephthalate) |
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Authors: | Manabe Norio Yokota Yoshimitsu Minami Hiroaki Uegomori Yuya Komoto Tadashi |
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Affiliation: | Suzuka Research Laboratory, Sumitomo Wiring Systems Co, Ltd, Mie, Japan. |
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Abstract: | A study was made to investigate an optimum condition for ruthenium tetraoxide staining of poly(butylene terephthalate) (PBT) with glass transition temperature as low as ca. 23 degrees C for TEM observation of melt-grown PBT crystals. The morphological study of ultrathin sections prepared based on optimum staining at 25 degrees C for 8 h revealed formation of fringed-micellar crystal nuclei in the early stage and folded-chain fringed-micellar crystals in the later stage of isothermal crystallization at 40 degrees C from melt. The fraction of chain-folded crystals increased with increasing crystallization temperature from the quantitative analysis of crystal thickness in comparison with the reported morphology using the replica method. |
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