• 한국고분자학회:학술대회논문집
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• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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• pp.101-101
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• 2006

We have studied the micellisation of poly(n-butyl acrylate)-block-poly(acrylic acid) and poly(n-butyl acrylate)-graft-poly(acrylic acid) in aqueous solution. The size and structure of the formed micelles was elucidated by scattering and imaging techniques. The micelle structure depends on pH, composition, and topology: graft copolymers form much smaller micelles that block copolymers of similar composition. We have also synthesized block copolymers of acrylic acid and N-isopropylacrylamide (NIPAAm) or N,N-diethylacrylamide (DEAAm). Due to the LCST of polyNIPAAm and polyDEAAm, these block copolymers spontaneously form micelles upon heating and they form inverse micelles upon decreasing pH below 4. If the LCST block is much longer than the PAA one, this presents a very convenient way to prepare crew-cut micelles. The polymers have been successfully used as stabilizers in emulsion polymerization. They also have been conjugated to streptavidin. The conjugates reversibly form mesoscopic particles on heating.

• 공업화학
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• 제16권1호
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• pp.39-44
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• 2005

본 연구에서는 HDI (hexamethylene diisocyanate)와 IPDI (isophorone diisocyanate), Polyol, 2-HEMA (2-hydroxy ethyl-methacrylate), n-BA (n-butyl acrylate) 그리고 MMA (methylmethacrylate)을 사용하여 폴리우레탄-아크릴 공중합 에멀젼 수지를 합성하였다. 또한 폴리올의 종류가 폴리우레탄-아크릴 에멀젼 수지의 제조 방법과 강도 및 내수성 등의 물성에 미치는 영향을 살펴 보았고 이를 아크릴 에멀젼 수지와 비교해 보았다. 실험 결과 폴리에스테르형 폴리올이 폴리에테르형 폴리올이나 아크릴 에멀젼보다 인장강도와 내수성 면에서 더 우수함을 보였다.

• 공업화학
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• 제18권2호
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• pp.121-125
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• 2007

아크릴계 에멀젼의 내수성 및 촉감을 향상시키기 위해 유연하고 낮은 표면에너지를 가지는 실록산 단량체 및 올리고머와의 공중합체를 제조하였다. 아크릴 작용기를 갖는 실록산 단량체와 올리고머를 합성하고, n-butyl acrylate와 methyl methacrylate를 사용하여 실록산 함유 아크릴 삼원공중합체를 제조하고 표면자유에너지의 변화 및 점착특성을 조사하였다. 삼원공중합체의 Tg는 실록산 단량체의 주입 양이 증가함에 따라 감소하였으나, 올리고머의 경우는 양 말단의 아크릴기에 의해 가교반응이 일어남으로써 삼원 공중합체의 Tg는 증가하였다. 실리콘 단량체와 올리고머를 첨가함에 따라 tack 값과 표면에너지가 감소하는 것으로 내수성 및 촉감이 향상된 것을 확인하였다

• 폴리머
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• 제27권6호
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• pp.596-602
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• 2003

고분자 유화제를 2-에틸헥실 아크릴레이트와 n-부틸 아크릴레이트 그리고 아크릴산 단량체를 사용하여 단량체 조성과 분자량을 변화시켜 용액중합에 의해서 합성하였다. 합성된 고분자 유화제를 이용하여 반연속식 유화중합을 통해 수성 아크릴 에멀션 점착제를 제조하였다. 그 결과, 입자크기는 약 145 nm 정도로 전형적인 유화제에 비해 상대적으로 작게 나타났고, 입자크기분포도는 단분산적 형태를 보였다. 에멀션을 이용한 동결-해빙 시험결과 기존 유화제를 사용한 경우 2회 반복 후 응집이 발견되었으나, 고분자 유화제의 경우 7회 반복 후에도 응집이 보이지 않아 저장안정성이 매우 우수함을 나타냈다. 접착시험 결과 초기점착력과 점착력은 고분자 유화제의 분자량이 증가함에 따라 또한 아크릴산 함량이 높을수록 감소하는 경향을 나타내었고, 반면 유지력은 증가하였다.

• Macromolecular Research
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• 제17권5호
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• pp.313-318
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• 2009

The side chain liquid crystal triblock copolymers (TBCs), which underwent phase transitions below their decomposition temperature, were prepared by copolymerization of poly(n-butyl acrylate) and a comonomer containing the mesogenic azobenzene group. The physical properties of TBCs in the distinctive transition temperature ranges were investigated in terms of the liquid crystal (LC) content in the copolymers. The phase transition temperatures traced optically, thermally and rheologically were well coincided one another and clearly exhibited the phase transition of smectic-nematic-isotropic with increasing temperature. In the smectic phase, increasing temperature made the liquid crystal system more elastic, but viscosity (${\eta}'$) remained almost constant. In the nematic phase, increasing temperature abruptly decreased ${\eta}'$ and G', ultimately leading to isotropic phase. Both smectic and nematic phases exhibited Bingham viscosity behavior but the former gave much greater yield stress at the same LC content.

• 폴리머
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• 제24권4호
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• pp.469-476
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• 2000

아크릴 공중합체와 점착부여제와의 상용성을 점착제의 물성에 영향을 주었다. 특히 높은 분자량과 좁은 분자량 분포를 가진 아크릴 공중합체가 혼합된 점착제는 상용계에 한해서만 점착 부여제의 함량증가에 따른 체계적인 물성 향상을 보였으며 이들 두 성분간의 상용성을 확인하는 것은 점착제의 물성에 매우 중요하다는 것을 알게 되었다.

• 한국고분자학회:학술대회논문집
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• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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• pp.289-289
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• 2006

The carboxylated MWNTs were successfully prepared by conventional acid treatment, and their structures were confirmed by FT-IR, Raman and TEM analysis. The water-dispersibility of the surface modified WNTs were good. The COOH-MWNT will show better stability during the emulsion polymerization as compared with Pristine MWNT. In-situ emulsion polymerizations of methyl methacrylate N(MMA) and n-butyl acrylate (BA) were carried out. Aggregate size and dispersion stability of the CNTs in water phase were measured using dynamic light scattering, turbidity, UV-visible spectrophotometer, and electron microscope. In addition, thermo-mechanical properties of MWNT/polymer nanocomposites were investigated.

• 폴리머
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• 제34권4호
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• pp.306-312
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• 2010

Triphenylvinylsilane (TPVS) containing vinyl acetate (VAc), butyl acrylate (BA), and Nmethylolacrylamide (NMA) copolymers were prepared by emulsion polymerization. The polymerization was performed at $80^{\circ}C$ in the presence of auxiliary agents and ammonium peroxodisulfate (APS) as the initiator. Sodium dodecyl sulphate (SDS) and Arkupal N-300 were used as anionic and nonionic emulsifiers, respectively. The resulting copolymers were characterized by using Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), and dynamic light scattering (DLS). Thermal properties of the copolymers were studied by using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The morphology of copolymers was also investigated by scanning electron microscopy (SEM) and then the effects of silicone concentrations on the properties of the TPVS-containing VAc-acrylic emulsion copolymers were discussed. The obtained copolymers have high solid content (50%) and can be used in weather resistant emulsion paints as a binder.

• 한국응용과학기술학회지
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• 제17권4호
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• pp.262-266
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• 2000

Acrylic pressure sensitive adhesives of n-butyl acrylate, 2-ethyl acrylate, methyl acrylate, vinyl acetate, acrylic acid, acrylonitrile and 2-hydroxyethyl acrylate were synthesized and basic physical properties of pressure sensitive adhesives with increasing the contents of 2-hydroxyethyl acrylate were investigated. 2-Hydroxyethyl acrylates effects on glass transition temperature, viscosity, hardening time and peel strength. Glass transition temperature(Tg) decreased with increasing the contents of 2-hydroxyethyl acrylate. Viscosity and hardening time were increased with increasing the contents of 2-hydroxyethyl acrylate. On the other hands, peel strength increased with increasing the contents of 2-hydroxyethyl acrylate up to 6 wt% and the decreased at further higher contents of 2-hydroxyethyl acrylate. In peel test, interfacial failure was occured in 8 wt% and 10wt%.

• 폴리머
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• 제27권1호
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• pp.17-25
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• 2003

원자 이동 라디칼 중합 (ATRP)을 이용하여 CuBr/N,N,N',N",N"-pentamethyldiethylene triamine 촉매 시스템하에서 용액중합으로 polystyrene 거대 개시제와 polystyrene-b-t-poly(butyl acrylate) (PS-b-P(tBA)) 블록 공중합체를 합성한 후, 가수분해를 통해 polystrene-b-poly(acrylic acid) 양친매성 블록 공중합체를 얻었다. 또한, 이를 중화하여 블록 이오노머를 제조하였다. 합청된 PS-b-P(tBA) 블록 공중합체는 분자량이 5000-10000 정도로 조절되었고, 분자량 분포도 1.2 이하로 비교적 좁게 나타났다. 공중합체는 $^1$H-NMR, FT-IR로 분석하였으며, DSC로 열적 성질을 측정한 결과, styrene의 비율이 더 많기 때문에 100 $^{\circ}C$ 근처에서 T$_{g}$가 나타났으며, TEM을 통해 이온 그룹의 상분리를 확인하였다.분리를 확인하였다.