• 공업화학
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• 제5권4호
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• pp.743-747
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• 1994

Acrylic urethane 수지의 경화반응에서 아크릴수지 중의 carboxylic acid 함유량과 dibutyltin dilaurate(DBTL)의 촉매 효과가 반응속도에 미치는 영향을 검토하였다. 얇은막의 상태에서 acrylic polyol과 지방족 isocyanate의 biuret화합물과의 경화반응은 2차식에 따른다. 그리고 acrylic polyol 중의 carboxylic acid의 양이 반응속도에 미치는 영향은 매우 크며, isocyanate지에 대한 강한 촉매 효과가 나타났다. 한편 carboxylic acid를 함유하지 않은 acrylic polyol에 DBTL을 첨가하면 촉매효과가 많이 나타나지만, carboxylic acid를 함유한 acrylic polyol의 경우에는 그 효과가 적게 나타났다.

• 한국식품위생안전성학회지
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• 제8권2호
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• pp.105-117
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• 1993

고흡수제인 폴리(아크릴산소다-아크릴산)을 사료에 0, 1.25, 2.5 , 5%의 농도로 혼합하여 경구로 투여했을 때의 아급성독성을 평가하였다. 시험기간 동안 폴리(아크릴산소다-아크릴산)Dml 평균 시험물질 섭취량은 수컷에서는 1025, 2009, 4728mg/kg/day이며, 암컷에서는 1011, 2088 및 4576mg/kg/day 이었다. 체중증가, 임상증상관찰, 혈액학적, 혈액생화학적 검사결과 실험물질로 인한 독성영향은 관찰되지 않았으며, 뇨 분석, 부검 및 조직학적 검사결과에서도 특기할 만한 독성증상은 나타나지 않았다. 이상의 결과를 종합하여 보면, 폴리(아크릴산소다-아크릴산)의 무영향량은 사료중 함유 농도가 1.25%(평균 시험물질 섭취량이 수컷: 1025mg/kg/day, 암컷 : 1011mg/kg/day)인 것으로 판단되었다.

• Journal of Microbiology and Biotechnology
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• 제19권5호
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• pp.474-481
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• 2009

A novel microorganism, designated as LG12, was isolated from soil based on its ability to use acrylic acid as the sole carbon source. An electron microscopic analysis of its morphological characteristics and phylogenetic classification by 16S rRNA homology showed that the LG12 strain belongs to Rhodococcus erythropolis. R. erythropolis LG12 was able to metabolize a high concentration of acrylic acid (up to 40 g/l). In addition, R. erythropolis LG12 exhibited the highest acrylic acid-degrading activity among the tested microorganisms, including R. rhodochrous, R. equi, R. rubber, Candida rugosa, and Bacillus cereus. The effect of the culture conditions of R. erythropo/is LG12 on the production of 3-hydroxypropionic acid (3HP) from acrylic acid was also examined. To enhance the production of 3HP, acrylic acid-assimilating activity was induced by adding 1 mM acrylic acid to the culture medium when the cell density reached an $OD_{600}$ of 5. Further cultivation of R. erythropo/is LG 12 with 40 g/l of acrylic acid resulted in the production of 17.5 g/l of 3HP with a molar conversion yield of 44% and productivity of 0.22 g/l/h at $30^{\circ}C$ after 72 h.

• Nuclear Engineering and Technology
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• 제5권2호
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• pp.103-114
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• 1973

본 실험은 방사선을 이용하여 Polyester 직포의 흡수성과 염색성 그리고 대전성을 증진시키기 위한 연구로서 실온하에서 함침법으로 Acrylic acid또는 4-vinylpyridine을 Polyester 직포에 접목시켰다. Polyester 직포를 25$^{\circ}$또는 7$0^{\circ}C$에서 Acrylic acid나 Acrylic acid와 4-vinylpyridine의 emulsion 용액에 함침시켰으며 함침된 Polyester 직포를 질소깨스 존재 하에서 Co-60의 l-rays로 조사시켰다. Acrylic acid가 접목된 Polyester 직포를 Sodium carbonate, Calcium acetate 또는 Potassium persulfate로 처리하였을 때 흡수율은 더욱 증가하였으며 직포 표면에 형성된 polyacrylic acid 는 0.1% NaoH 용액으로 대부분 추출되었다. 4-vinylpyridine과 Acrylic acid의 혼합용액을 함침용액으로 사용하였을 경우 4-VP/AA의 비율과 방사선 선량이 커짐에 따라 접목율은 점점 증가함을 보여주었다. 여러가지로 처리된 Polyester 직포 표면에 물방울을 떨어 뜨렸을 때의 Contact angle을 측정하여 보니 접목율이 증가함에 따라 대전성은 감소하였다. Acryli acid가 접목된 Polyester 섬유를 Salt로 처리하여 전자 현미경으로 관찰하여 본 결과 일련의 무정형 형태로 결합되어 있었다.

• 한국의류학회지
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• 제24권5호
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• pp.686-695
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• 2000

Recently, with a growing interest of health and environment, chitosan which was good in no harmful effect to human body and environment, has been watched as the finish treatment of hygiene and pleasantness. The purpose of this study is to develop multifunctional fabric that was improved antimicrobial activity and deodorization rate, water absorption, static voltage and dye absorption by treatment of nylon 6 grafted with acrylic acid added in chitosan. FT-IR spectra of the grafted with acrylic acid added in chitosan shows peaks of COOH and NH2. Antimicrobial activity and deodorization rate of chitosan and grafted with acrylic acid added in chitosan were increased greatly than the control, durability of laundry of grafted with acrylic acid added in chitosan was good. In case of chitosan was dyed acid dyes and grafted with acrylic acid added in chitosan was dyed basic dyes, dye absorption of them were increased than the control. Moisture regain, absorption time and tensile strength of grafted with acrylic acid added in chitosan was increased greatly than the control.

• 공업화학
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• 제2권1호
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• pp.70-76
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• 1991

수용성 poly(sulfonated styrene-co-acrylic acid)를 합성하여 Cu(II)이온과의 착물형성에 관한 연구를 수행하였다. poly(sulfonated styrene-co-acrylic acid)-Cu(II)착물의 생성반응에 있어서 pH 변화에 따른 UV-Vis. 흡수 스펙트라 및 점도 특성을 시험하여 착물형성조건을 검토하였다. 또한, poly(sulfonated styrene-co-acrylic acid)-Cu(II) 착물의 생성상수와 안정도상수를 Bjerrum 방법으로 구하였고 Ringbom 방법으로 착물생성 엔탈피, 자유에너지 및 엔트로피 변화 등 열역학적 특성값을 구하였다.

• KSBB Journal
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• 제16권1호
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• pp.82-86
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• 2001

Glyco-acrylate and methacrylate were synthesized by lipase-catalyzed glycosylation of acrylic acid, methacrylic acid and their vinyl esters with $\beta$-methyl fructoside and glycerol in t-butanol as a reaction medium. At the optimum conditions for enzymatic glycosylation of acrylic acid and vinyl methacrylate, we attained up to 80% conversion for glyco-acrylate from acrylic acid and 90% conversion for glyco-methacrylate from vinyl methacrylate. The polymerizable glyco-acrylates and methacrylate have biomedical application as hydrophilic monomers and hydration modifiers to be use for hydrogel contact lens formulation.

• 한국염색가공학회지
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• 제14권6호
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• pp.313-318
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• 2002

Chitosan is known to be an excellent biocompatible natural polymer. Recently, with a growing interest of health and environment, chitosan which is good in no harmful effect on human body and environment, has been watched as the finish treatment of hygiene and pleasantness. The purpose of this study is to develop multi functional fabrics by chitosan added on acrylic acid grafted cotton fabrics. Therefore physical properties such as moisture regain, air permeability, whiteness, static voltage and tensile strength of chitosan added on acrylic acid grafted cotton fabrics were investigated. The results are as follows ; According to increased chitosan's concentration, grafting yield was decreased. Therefore thickness of film by treated chitosan added on acrylic acid grafted cotton fabric became thin. FT R spectra of chitosan add on acrylic acid grafted cotton fabric clearly showed peaks of COOH and $NH_2$, Moisture regain, static voltage of chitosan add on acrylic acid grafted cotton fabrics were increased than control. Air permeability, whiteness and tensile strength were decreased than control.

• 한국환경과학회지
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• 제7권6호
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• pp.753-759
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• 1998

In physical and reactive extraction of acrylic acid using various solvents the equilibrium characteristics of extraction were investigated. The degree of extraction in reactive extraction with Tri-n-octylamine(TOA) was 1.5~3 times than that in physical extraction. Distribution ratio was constant in methyl isobutyl ketone(MIBK) and n-butylacetate(n-BAc) but was increased with increasing the concentration of acrylic acid in benzene and chloroform. It can be explained by formation of dimers. Maximum extraction leadings of acrylic acid were three in benzene and were two in MIBK, chloroform and n-BAc, and it was found that acrylic acid was extracted as the form of $A_3$R In benzene and $A_2R$ in MIBK, chloroform and n-BAc. In effect of solvent, the degree of extraction was increased as he difference of solubility parameter of solvent and solute was decreased, and as dielectric constant of solvent was increased.

• 한국의류학회지
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• 제27권11호
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• pp.1252-1259
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• 2003

The purpose of this study is to develop multi-functional fabrics by chitosan added on acrylic acid grafted cotton kintted fabrics. Therefore physical properties such as antimicrobial activity, deodorization rate, moisture regain, whiteness, and tensile strength of chitosan added on acrylic acid grafted cotton kintted fabrics were investigated. The results are as follows; According to increased chitosan's concentration, grafting yield was decreased. Therefore thickness of film by treated chitosan added on acrylic acid grafted cotton kintted fabric became thin. FT-IR spectra of chitosan add on acrylic acid grafted cotton kintted fabric clearly showed peaks of COOH and NH$_2$. Antimicrobial activity and deodorization rate of chitosan add on acrylic acid grafted cotton kintted fabrics were increased greatly than untreated. And their durability of laundry were good, Moisture regain of treated fabrics was higher than untreated. Whiteness and tensile strength of treated fabrics were lower than untreated.