• 접착 및 계면
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• 제20권4호
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• pp.135-139
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• 2019

본 연구에서는 인계 난연성 단량체를 점착성 아크릴 단량체인 butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, acrylic acid, 2-hydroxyethyl methacrylate와 고형분 65%에서 공중합을 진행하여 난연성 수성 아크릴 에멀젼 점착제를 합성하였다. 이때 전환율은 100%를 보이며 인계 난연 단량체의 첨가량에 따라 점착제의 점도에 차이가 발생하였고 최대 5500cps의 점도를 나타내었다. FT-IR로 아크릴 점착제의 구조분석을 진행하였고, differential scanning calorimeter (DSC) 열적 특성을 측정하였다. 인계 난연 단량체의 첨가에 따라 유리전이온도(Tg)는 미첨가시 -44.1℃에서 최대첨가량 15part에서 -31.4℃로 증가하였다. 박리강도는 미첨가시 2100gf/inch였으며 첨가량 15part에서는 200gf/inch를 나타내었고 난연성 수성 아크릴 에멀젼 점착제의 방염성을 평가하여 난연성 점착제로서의 특성 확인하였다.

• 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.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2011년도 춘계학술발표회 논문집
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• pp.327-338
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• 2011

This study was carried in order to manufacture the high quality coated paper. High quality includes not only properties of coated paper but also final print quality. In this study, new acrylic-styrene emulsion was polymerized in laboratory and compared with styrene-butadiene latex. Low-shear viscosity of coating color was decreased with increasing acrylic-emulsion dosage. WRV was increased with addition and decreased with substitution of acrylic-emulsion. Paper gloss, brightness and whiteness were increased and PPS and opacity was slightly decreased with acrylic-emulsion. Ink gloss was increased with using No. 3 acrylic-emulsion due to lower ink setting properties. However No.1, 2 emulsion shows opposite situation. Surface strength of coated paper was increased with using No. 3 acrylic-emulsion These results indicate that high quality coated paper can be manufactured with using No. 3 acrylic-emulsion.

• 한국응용과학기술학회지
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• 제27권2호
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• pp.188-195
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• 2010

In this study, we experimented that how to synthesis waterborne urethane-acrylic hybrid resin for leather coatings. First of all, We had analyzed data by FT-IR, SEM and TGA for the machanical properties. By TGA analysis polymers showed heat distortion temperature. and by FT-IR measurement we confirmed that synthesis of urethane and acrylic. In the experiment, solvent resistance, polyurethane and acrylic grades 4-5 showed both a high. Tensile strength measured in the waterborne polyurethane > Acrylic emulsion showed strength in the order. Films were obtained by coating the water born resin on leveled surfaces and allowing them to dry at room temperature for 72hrs. After demolding, the films were kept in a desiccator to avoid moisture contant at $25^{\circ}C$ for 45hrs before the measurements. In this result, the mechanical propersies of waterborne polyurethane-acrylic hybrid resin showed that how effect to resin in leather coating between polyurethane content and acrylic content. Therefore, acrylic emulsion had most high solvent resistance glade and waterborne polyurethane had good result in abrasion test and tensile strength.

• 펄프종이기술
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• 제44권1호
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• pp.37-42
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• 2012

This study was carried in order to manufacture the high quality coated paper. High quality includes not only physical and optical properties of coated paper but also final print quality. In this study, new acrylic-styrene emulsion was polymerized in laboratory and compared with conventional styrene-butadiene latex. Low-shear viscosity of coating color was decreased with increasing acrylic-emulsion dosage. Small amount of acrylic emulsion addition increased water retention, but further addition decreased it. Acrylic-emulsion addition improved paper gloss, brightness and whiteness, but decreased PPS and opacity slightly. Ink gloss was increased with using No. 3 acrylic-emulsion due to lower ink setting properties. However No. 1 and 2 emulsion showed the opposite result. Surface strength of coated paper was increased with using No. 3 acrylic-emulsion. These results indicate that high quality coated paper can be manufactured with using No. 3 acrylic-emulsion.

• 대한소아치과학회지
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• 제30권1호
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• pp.69-79
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• 2003

자가중합형 아크릴릭 레진에 polyp를 혼합하지 않은 대조군, 그리고 레진 분말에 대한 polyP(사슬길이 13과 18의 혼합물인 Calgon)의 무게비를 1%로 혼합한 polyP 1%군, 2% 혼합한 polyP 2%군 및 3% 혼합한 polyP 3%군으로 분류하여 경화시킨 후, 경화된 각각의 레진과 실험균주 S. mutans GS5, S. sobrinus 6715, S. gordonii G9B및 Challis, 그리고 P. gingivalis 2561과 Candida albicans ATCC90027을 대상으로 레진표면에 대한 미생물들의 부착의 정도, 성장 억제효과 및 접촉각의 변화를 관찰하여 그 결과로 미루어 아크릴릭 레진에 포함된 polyP는 구강 미생물에 대해 직접적으로 강한 항균 효과를 나타내지는 않는 것으로 판단되나 미생물의 부착 특히 우식원인균인 mutans streptococci의 부착을 방해하는 것으로 가늠되며, 이는 polyP의 첨가에 의한 아크릴릭 레진 표면에서 일어난 소수성의 변화가 일부 관여하는 것으로 여겨진다. PolyP가 혼합된 아크릴릭 레진의 장착은 일반적인 아크릴릭 레진으로 제작된 가철성 장치를 장착한 후 나타날 수 있는 우식 이환의 가능성을 감소시킬 수 있는 임상적 적용 가능성을 제시하였다고 여겨진다.

• 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.

• 한국응용과학기술학회지
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• 제26권1호
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• pp.93-101
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• 2009

Antistatic acrylic resin is made from n-butyl methacrylate, methyl methacrylate, dimethyl amino ethyl methacrylate(DMAEMA), 2-ethyl hexyl methacrylate, hydroxy ethyl methacrylate, 2,2'-azobis iso-butyronitrile by synthesis. To achieve a lowest surface resistance of antistatic acrylic resin was applied to a variety of synthesis processes. The acrylic resin has been determined from the value of surface resistance and -then the antistatic acrylic resin including dimethyl amino ethyl methacrylate of the 10%, 20% and 30% is synthesized. Finally, dimethyl sulfate(DMS) on a variety of weight ratios is added to antistatic acrylic resin. When DMAEMA / DMS weight ratio is 1/1, antistatic acrylic resin isn't haze the lower the surface resistance. Compared to the traditional antistatic agent, all aspects of the physical properties is outstanding.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 가을 학술논문 발표대회
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• pp.162-163
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• 2021

To prepare the waterborne silicone acrylic resin coatings, acrylic resin was prepared by a radical polymerization. Glass transition temperature(Tg) of the acrylic copolymer was fixed at 30℃ and the contents of tertiary amine monomer(DMAEMA), were varied to be 5, 10, 15 and 20 wt%, hydroxyl monomer, and carboxyl monomer were fixed 10 wt%, and 4 wt% respectively. γ-Glycidoxypropyltrimethoxysilane(GPTMS) containing epoxy group was used for curing agents. The eqivalent ratio of amine to epoxy was 1:1. The prepared coatings exhibited excellent adhesion to various substrates, and various physical properties of the coatings were satisfactory. The gloss retension and color difference were improved at low tertiary amine concentration. The coatings containing 10wt% tertiary amine concentration have especially good weather resistant properties.