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A series of copper spacers (Longmei Copper Foil Co.,Nanjing, China) with thicknesses ranging from 1 to100 lm were used as a mold. However, the thicknesses of the films obtained were a little higher than the theoretical value. So a focusing ring of an optical microscope was used to measure the precise thickness of the polymer films. ËûÃǵÄÒâ˼ÊǰÑÒ»¸öÍµæÆ¬·ÅÔÚÁ½¸ö²£Á§Æ¬Ö®¼ä×÷Ϊģ¾ß£¬¾ßÌåµÄºñ¶ÈÊÇÔõô²âÁ¿µÄ£¿a focusing ring of an optical microscope ÊǹâѧÏÔ΢¾µµ÷½¹»·µÄÒâ˼Âð£¿ÓÃÕâÍæÒâÔõô²âºñ¶È£¿ ÎÄÕ£ºCracking in Poly(trimethylene terephthalate) Spherulites DOI 10.1002/app.29138 Published online 30 October 2008 in Wiley InterScience (www.interscience.wiley.com). |
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