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정동진 ( Jeong Dong Jin ),이애리 ( Lee Ae Li ),유혁재 ( Yu Hyeog Jae ),정충호 ( Jeong Chung Ho ),박홍수 ( Park Hong Su ) 한국유화학회 2004 한국응용과학기술학회지 Vol.21 No.1
N/A Reaction intermediates PCP/BZA (PBI) and tetramethylene bis(orthophosphate) (TBOP) were synthesized from polycaprolactone (PCP) and benzoic acid (BZA) and from pyrophosphoric acid and 1,4-butanediol, respectively. Benzoic acid modified polyesters containing phosphorus (APTB-5, -10, -15) were synthesized by polycondensation of the prepared PBI (containing 5, 10, 15wt% of benzoic acid), TBOP, adipic acid, and 1,4-butanediol. The structure and characteristics of APTBs were examined using FT-IR, NMR, GPC, and TGA analysis. The increase of the amount of BZA in the synthesis of APTBs resulted in decrease in average molecular weight and kinematic viscosity. From the TGA analysis of APTBs, it was found that the afterglow decreased with the amount of BZA content at the high temperatures.
Acetoacetoxy기 함유 하이솔리드 도료용 아크릴 수지의 합성
유혁재 ( Yu Hyeog Jae ),정동진 ( Jeong Dong Jin ),정충호 ( Jeong Chung Ho ),함현식 ( Ham Hyeon Sig ),박홍수 ( Park Hong Su ),김태옥 ( Kim Tae Og ) 한국유화학회 2003 한국응용과학기술학회지 Vol.20 No.3
N/A A copolymer (HSAs: EA/EMA/2-HEMA/AAEM) which is an acrylic resin containing 70% solid content was synthesized by the reaction of monomers, including ethyl acrylate, ethyl methacrylate, and 2-hydroxyethyl methacrylate with a functional monomer, such as acetoacetoxyethyl methacrylate, which may give improvements in cross-linking density and physical properties of films. The physical properties of prepared acrylic resins, HSA containing AAEM, are as follows : viscosity, 203~550cps ; M_(n), 2590~2850 ; and conversion, 82~89%, respectively. It was found from the plotting of T_(g) versus viscosity and T_(g) versus molecular weight that viscosity increased with T_(g), while number averaged molecular weight decreased with increasing T_(g).