TMA 4000 ¸ðµ¨À» ÀÌ¿ëÇÏ¿© ´Ù¾çÇÑ ÃøÁ¤ ¾×¼¼¼¸®¸¦ ÀÌ¿ëÇÏ¿© ¾Æ·¡¿Í °°ÀÌ µ¥ÀÌÅ͸¦ ÃøÁ¤ÇØ º¸¾Ò´Ù.
a. ´Ù¾çÇÑ ±Ý¼Ó¹°ÁúÀÇ ¿ÆØÃ¢°è¼ö ÃøÁ¤ |
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NIST(National Institute of Standards and Technology)¿¡¼ °øÀÎµÈ ±Ý¼Ó Ç¥Áع°ÁúÀ» TMA systemÀ¸·Î ÃøÁ¤ÇÏ¿´À¸¸ç, ÃøÁ¤ÇÑ °á°ú¸¦ ºñ±³Çغ¸¸é µ¿ÀÏÇÏ°Ô µ¥ÀÌÅͰ¡ ÃøÁ¤µÇ´Â °ÍÀ» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù. |
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Fig1. Expansion of pure elemental standards aluminum, gold and silicon
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Fig2. Expansion of Borosilicate glass
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b. Compression mode¸¦ ÀÌ¿ëÇÑ ¿¬ÈÁ¡ ÃøÁ¤ |
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¾Ë·ç¹Ì´½ À½·á ĵ¿¡ ÄÚÆÃµÈ ¶óÀ̳ÊÀÇ ¿¬ÈÁ¡À» Compression mode¸¦ ÀÌ¿ëÇÏ¿© ÃøÁ¤ÇÏ¿´À¸¸ç, ±× °á°ú 105¡É¿¡¼ º¯°îµÇ´Â ¿¬ÈÁ¡À» ÃøÁ¤ÇÒ ¼ö ÀÖ¾ú´Ù. ÀÌ ½ÇÇèÀº ÃÖ±Ù¿¡ ¿¬±¸µÇ´Â BPA-epoxy polymerÀÇ ´ëü¹°ÁúÀ» ã´Âµ¥ Ȱ¿ëµÉ ¼ö ÀÖ´Ù. |
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Fig3. Detection of Softening point of a food/beverage can lining
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c. Æú¸®½ºÆ¼·»ÀÇ ¿¬ÈÁ¡ ÃøÁ¤ ? ASTM D 648, E2092 |
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ASTM¿¡ ±ÔÁ¤µÈ ³»¿ë°ú °°ÀÌ 66psi ¶Ç´Â 0.445NÀÇ ÈûÀ» ·ÎµùÇÑ »óÅ¿¡¼ Æú¸®½ºÆ¼·»ÀÇ ¿¬ÈÁ¡À» ÃøÁ¤ÇÏ¿´À¸¸ç, ±× °á°ú 0.20%ÀÇ º¯À§ Â÷°¡ ¹ß»ýÇÏ´Â °ÍÀ» TMA 4000¸ðµ¨·Î È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù. |
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Fig 4. HDT/DTUL flexure test Heat Deflection at 66psi(0.445N) of Polystyrene
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