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·¹Áø ¸ð³ë¸ÓÀÇ ÁßÇÕÀüȯ·ü Áõ°¡¸¦ À§ÇÑ 3Á¾ ÁßÇÕ°³½Ã ½Ã½ºÅÛÀÇ ÀûÁ¤ ºñÀ²

Optimal combination of 3-component photoinitiation system to increase the degree of conversion of resin monomers

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±èâ±Ô, ¹®È£Áø, ½Åµ¿ÈÆ,
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±èâ±Ô ( Kim Chang-Gyu ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
¹®È£Áø ( Moon Ho-Jin ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç
½Åµ¿ÈÆ ( Shin Dong-Hoon ) - ´Ü±¹´ëÇб³ Ä¡°ú´ëÇÐ Ä¡°úº¸Á¸Çб³½Ç

Abstract

¿¬±¸¸ñÀû: ¿©·¯ °¡Áö ¹®Á¦Á¡À» °¡Áö°í ÀÖ´Â ±âÁ¸ÀÇ ÁßÇÕ°³½ÃÁ¦ÀÎ CQ¿Í »õ·Î¿î °³½ÃÁ¦ÀÎ p-octyloxy-phenyl-phenyl iodonium hexafluoroantimonate (OPPI), ÁßÇÕÃËÁøÁ¦ÀÎ Áö¹æÁ· ¾Æ¹Î(DMAEMA)À» Æ÷ÇÔÇÑ 3Á¾ ÁßÇÕ°³½Ã½Ã½ºÅÛÀ» ÇÔÀ¯ÇÑ ·¹Áø ¸ð³ë¸ÓÀÇ ÁßÇÕÀüȯ·üÀ» ÁõÁø½ÃÅ°±â À§ÇÑ °¢°¢ÀÇ Á¶¼º ºñÀ²À» ¾Ë¾Æº¸°í ÁßÇÕ°³½ÃÁ¦¿Í ÁßÇÕÃËÁøÁ¦ÀÇ ºñÀ²¿¡ µû¸¥ ¿µÇâÀ» ºÐ¼®ÇÏ°íÀÚ ÇÏ¿´´Ù.

¿¬±¸ Àç·á ¹× ¹æ¹ý: BisGMA/BisEMA/TEGDMA Á¶¼ºÀÇ ·¹Áø ¸ð³ë¸Ó¸¦ Á¦Á¶ÇÑ ´ÙÀ½ ´Ù¾çÇÑ ³óµµ Á¶ÇÕÀÇ CQ, OPPI, DMAEMA¸¦ È¥ÇÕÇÏ¿´´Ù. °¢°¢ÀÇ ¹°ÁúÀ» 0.2 wt.% (Àú³óµµ, L), 1.0 wt.% (Áß°£³óµµ, M), 2.0 wt.% (°í³óµµ, H)ÀÇ 3°¡Áö ³óµµ·Î È¥ÇÕÇÏ¿´À¸¸ç, ±× ³óµµ ºñÀ²¿¡ µû¶ó 9°³ÀÇ ½ÇÇ豺À¸·Î Á¦ÀÛÇÏ¿´´Ù: LLL, LMM, LHH, MLM, MMH, MHL, HLH, HML, HHM (CQ-OPPI-DMAEMAÀÇ ³óµµ) ÁßÇÕ ½Ã½ºÅÛÀÌ ÇÔÀ¯µÈ °¢°¢ÀÇ ·¹Áø ¸ð³ë¸Ó¸¦ NaCl disk¿¡ ¾ÐÂøÇÑ ´ÙÀ½ Demetron 400 ±¤ÁßÇձ⸦ ÀÌ¿ëÇÏ¿© 5ÃÊ, 20ÃÊ, 40ÃÊ, 60ÃÊ, 300ÃÊ µ¿¾È ±¤ÁßÇÕ ÇÏ¿´À¸¸ç, FTIR·Î Àüȯ·ü(Degree of Conversion, DC)À» ÃøÁ¤ÇÏ¿´´Ù. Á¶¼ººñÀ²Àº ANOVA¿Í Duncan »çÈÄ°ËÁ¤¹ýÀ» ÀÌ¿ëÇÏ¿´À¸¸ç ÁßÇÕ°³½ÃÁ¦¿Í ÁßÇÕÃËÁøÁ¦ÀÇ ºñÀ²ÀÌ °°Àº ½ÇÇ豺µéÀÇ »óÈ£ºñ±³¿¡´Â T-°ËÁ¤µµ ½ÃÇàÇÏ¿´´Ù.

°á°ú: ÁßÇÕ°³½Ã½Ã½ºÅÛÀ» ÀÌ·ç´Â Á¶¼ºµéÀÇ ³óµµ Á¶ÇÕ¿¡ µû¶ó ÁßÇÕÀüȯ·üÀÇ Â÷À̸¦ º¸¿´À¸¸ç, MMH ±º°ú HHM ±ºÀÌ ³ôÀº Ãʱâ ÁßÇÕÀüȯ·üÀ» º¸¿´´Ù. ÁßÇÕ°³½ÃÁ¦(CQ, OPPI)¿Í ÁßÇÕÃËÁøÁ¦ÀÎ DMAEMAÀÇ ºñÀ²¿¡ µû¸¥ ÁßÇÕÀüȯ·üÀÇ Â÷À̸¦ º¸ÀÌÁö ¾Ê¾ÒÀ¸¸ç, CQÀÇ ³óµµ´Â Àüȯ·ü¿¡ ¿µÇâÀ» ÁÖÁö ¾ÊÀº ¹Ý¸é, OPPIÀÇ ³óµµ´Â Àüȯ·ü¿¡ ¿µÇâÀ» ¹ÌÃÆ´Ù.

°á·Ð: ÁßÇÕÀüȯ·üÀÌ ³ôÀ¸¸ç ¹àÀº »ö»óÀÌ ÇÊ¿äÇÑ °æ¿ì¿¡´Â MMH Á¶ÇÕÀ», £°Å³ª ºÒÅõ¸íÇÑ °æ¿ì¿¡´Â MMH Á¶ÇÕÀÌ ÃßõµÈ´Ù.

Objectives: This study investigated the optimal combination of 3-component photoinitiation system, consisting of CQ, p-octyloxy-phenyl-phenyl iodonium hexafluoroantimonate (OPPI), and 2-dimethylaminoethyl methacrylate (DMAEMA) to increase the degree of conversion of resin monomers, and analyze the effect of the ratio of the photoinitiator to the co-initiator.

Materials and Methods: Each photoinitiators (CQ and OPP) and co-initiator (DMAEMA) were mixed in three levels with 0.2 wt.% (low concentration, L), 1.0 wt.% (medium concentration, M), and 2.0 wt.% (high concentration, H). A total of nine groups using the Taguchi method were tested according to the following proportion of components in the photoinitiator system: LLL, LMM, LHH, MLM, MMH, MHL, HLH, HML, HHM. Each monomer was polymerized using a quartz-tungsten-halogen curing unit (Demetron 400, USA) for 5, 20, 40, 60, 300 sec and the degree of conversion (DC) was determined at each exposure time using FTIR.

Results: Significant differences were found for DC values in groups. MMH group and HHM group exhibited greater initial DC than the others. No significant difference was found with the ratio of the photoinitiators (CQ, OPPI) to the co-initiator (DMAEMA). The concentrations of CQ didn¡¯t affect the DC values, but those of OPPI did strongly.

Conclusions: MMH and HHM groups seem to be best ones to get increased DC. MMH group is indicated for bright, translucent color and HHM group is good for dark, opaque colored-resin.

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³óµµ; ÁßÇÕ°³½ÃÁ¦; ÁßÇÕÀüȯ·ü
Camphoroquinone; Concentration; Degree of conversion; DMAEMA; OPPI; Photoinitiator

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