• Title, Summary, Keyword: acrylate

Search Result 634, Processing Time 0.043 seconds

Dispersion Polymerization of Acrylate Monomers in Supercritical $CO_2$ using GMA-functionalized Reactive Surfactant (초임계 이산화탄소에서 Glycidyl methacrylate 반응성 계면활성제를 이용한 아크릴레이트의 분산중합)

  • Park, Kyung-Kyu;Kang, Chang-Min;Lee, Sang-Ho
    • Elastomers and Composites
    • /
    • v.45 no.4
    • /
    • pp.256-262
    • /
    • 2010
  • Dispersion polymerization of methyl acrylate, ethyl acrylate, butyl acrylate, and glycidyl methacrylate were performed in supercritical $CO_2$ at $80\;^{\circ}C$ and 346 bar. Glycidyl methacrylate linked poly(dimethylsiloxane) (GMS-PDMS) surfactant, which was prepared by linking glycidyl methacrylate to monoglycidyl ether terminated PDMS with amino-propyltriethoxysilane, was used as surfactant for the dispersion polymerization in $CO_2$. The yield of the poly(alkyl acrylate) polymers, synthesized in $CO_2$ medium, decreased as the alkyl tail of the acrylate monomers increased. Poly(glycidyl methacrylate) and poly(methyl acrylate) were produced in bead form whereas poly(ethyl acrylate) and poly(butyl acrylate) were viscous liquid. The poly(glycidyl methacrylate) particles had a number average diameter of 2.45 ${\mu}m$ and monodisperse distribution. The poly(methyl acrylate) had a number average diameter of 0.52 ${\mu}m$ and the particle size distribution was bimodal. The glass transition temperatures ($T_g$) of the poly(glycidyl methacrylate) and the poly(alkyl acrylate) products were 4~9 K higher than the $T_g$ of the corresponding acrylate polymers synthesized in conventional processes.

Effect of 2-Hydroxyethyl Acrylate for the Properties of Acrylic Pressure Sensitive Adhesives (2-Hydroxyethyl Acrylate가 아크릴계 점착제의 물성에 미치는 영향)

  • Jeong, Noh-Hee;Park, Young-Jun;Lee, Hyang-Woo;Nam, Ki-Dae
    • Journal of the Korean Applied Science and Technology
    • /
    • v.17 no.4
    • /
    • pp.262-266
    • /
    • 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%.

Preparation of Unsaturated Polyester-based Hybrid Gel-Coats Containing Urethane Acrylate and Their Coating Performance

  • Kim, Ji-Hee;Baek, Seung-Suk;Kim, Oh Young;Park, Dong Hyup;Hwang, Seok-Ho
    • Elastomers and Composites
    • /
    • v.54 no.3
    • /
    • pp.247-251
    • /
    • 2019
  • Two different urethane acrylates (mono-acrylate and di-acrylate) were used to prepare unsaturated polyester-based hybrid gel-coats. The physical properties and surface characteristics of these gel-coats were investigated on the basis of the content and type of urethane acrylate. The set-to-touch time increased and the physical properties (surface hardness and tensile strength) decreased with an increase in the urethane acrylate content. However, the type of urethane acrylate did not affect these parameters. It was found that the optimal urethane acrylate content for the application of unsaturated polyester-based hybrid gel-coats is ~10 wt%.

Characteristics of Isothermal Analysis and Emulsion Copolymerization of Vinyl Acetate/Alkyl Acrylate (비닐아세테이트/알킬아크릴레이트계 에멀젼 공중합과 등온 열분해 특성)

  • Cho, Dae-Hoon;Choe, Sung-Il;Seul, Soo-Duk
    • Journal of Adhesion and Interface
    • /
    • v.13 no.2
    • /
    • pp.64-72
    • /
    • 2012
  • Vinyl acetate/alkyl acrylate copolymers were prepared by water-born emulsion copolymerization according to the compositional change of vinyl acetate and various alkyl acrylates such as methyl acrylate (MA), ethyl acrylate (EA), and n-butyl acrylate (BA). Ammonium persulfate (APS) was used as an initiator and poly(vinyl alcohol) (PVA) was used as a protective colloid. The significant result was described as follows. The activation energy determined by an isothermal analysis in the temperature region between $100{\sim}200^{\circ}C$ of the copolymer had the order of PVAc/PMA > PVAc/PEA > PVAc/PBA. The peel strengths before and after the plasma treatment were the order of PVAc/PMA > PVAc/PEA > PVAc/PBA.

Spectroscopic Analysis on the Michael Addition Reaction between Secondary Amino Group Containing Silica Nanoparticles with (Meth)acrylate Monomers (2차 아미노기를 갖는 실리카 나노입자와 (메타)아크릴레이트 단량체와의 마이클 부가반응에 대한 분광학적 분석)

  • Jeon, Ha-Na;Ha, Ki-Ryong
    • Polymer(Korea)
    • /
    • v.36 no.5
    • /
    • pp.668-676
    • /
    • 2012
  • In this study, we modified silica nanoparticles with bis[3-(trimethoxysilyl)propyl]amine (BTMA) silane coupling agent to introduce secondary amino groups on the silica surface. After modification of silica, we investigated effects of different types of (meth)acrylate group containing monomers on the Michael addition reaction to introduce reactive (meth)acrylate groups on the BTMA modified silica surface. We used two kinds of (meth)acrylate monomers, trimethylolpropane ethoxylate triacrylate (TMPET) which has three identical acrylate groups, and 3-(acryloyloxy)-2-hydroxypropyl methacrylate (AHM) which has one acrylate and one methacrylate group. We used fourier transform infrared spectroscopy (FTIR), elemental analysis (EA) and solid state cross-polarization magic angle spinning (CP/MAS) nuclear magnetic resonance spectroscopy (NMR) to understand reactions between NH groups on the silica surface with (meth)acrylate groups of TMPET and AHM monomers. We found almost complete Michael addition reaction between all three acrylate groups of TMPET with NH groups on the BTMA modified silica. But, for the AHM treatment of BTMA modified silica, we found Michael addition reaction occurred only between acrylate groups of AHM and NH groups of silica surface, not between methacrylate groups of AHM and NH groups of BTMA modified silica surface.

Effect of Monomer on Crosslinking Properties of Acrylic Pressure-Sensitive Adhesives (아크릴계 점착제의 제조와 가교물성에 대한 모노머의 영향)

  • Kim, Pan Soo;Lee, Won-Ki
    • Journal of Adhesion and Interface
    • /
    • v.17 no.2
    • /
    • pp.56-61
    • /
    • 2016
  • This study was to investigate the effect of main monomer, butyl acrylate instead of 2-ethylhexyl acrylate, of acrylic PSAs on adhesive properties. The copolymers of butyl acrylate, acrylic acid and 2-hydroxyethyl acrylate were synthesized and their adhesive properties were investigated after crosslinking with two different agents. Comparing to 2-hydroxyethyl acrylate-based one which has branch-like side groups, butyl acrylate-based PSA with linear side groups show poor adhesive properties. In case of crosslinking agent, epoxy-typed agent than isocyanate-typed one showed better properties than isocyanate-typed one because epoxy-typed agent has more crosslinking sites and produces more flexible bonds, ester and ether, than isocynate-typed one. Most adhesive properties of PSAs were increased with acid content.

Study on the Improvement of Film Shrinkage in UV-curing Process (자외선 경화 과정에서의 필름 수축현상 개선에 관한 연구)

  • Kwon, Youn-Joong;Cho, Ur-Ryong
    • Polymer(Korea)
    • /
    • v.35 no.4
    • /
    • pp.320-324
    • /
    • 2011
  • Two functional urethane acrylates were synthesized by using polycarprolactonediol (PCLD) and diisocyanate. The synthesized fuctional urethane acrylate was mixed with butyl acrylate(BA) or adhesion promoters, and their properties were investigated. To synthesize an excellent transparent urethane acrylate, isophorone diisocyanate(IPDI) was used. In addition, the effect of adding butyl acrylate for the improvement of shrinkage of urethane acrylate was studied. The results showed that the addition of butyl acrylate improved the shrinkage, and the optimum butyl acrylate content was 15 wt%. Both 2-ethyl hexyl acrylate (2-EHA) and ethyl acrylate(EA) were polymerized at $85^{\circ}C$ for 4 hrs to use as adhesion promoters, and the polymerized adhesion promoters were mixed to the UV-curing resin. The results showed that the adhesion properties increased with the increase of adhesion promoters content up to 15 wt%.

Bubble-Point Measurement of Binary Mixture for the CO2 + Caprolactone Acrylate System in High Pressure

  • Jeong, Jong-Dae;Byun, Hun-Soo
    • Korean Chemical Engineering Research
    • /
    • v.57 no.6
    • /
    • pp.826-831
    • /
    • 2019
  • Experimental data of phase equilibrium is reported for caprolactone acrylate in supercritical carbon dioxide. Bubble-point data was measured by synthetic method at temperatures ranging from (313.2 to 393.2) K and pressures up to 55.93 MPa. In this research, the solubility of carbon dioxide for the (carbon dioxide + caprolactone acrylate) system decreases as temperature increases at a constant pressure. The (carbon dioxide + caprolactone acrylate) system exhibits type-I phase behavior. The experimental result for the (carbon dioxide + caprolactone acrylate) system was correlated with Peng-Robinson equation of state using mixing rule. The critical property of caprolactone acrylate was predicted with the Joback and Lyderson method.

A Study on the Effect of Surfactant in Synthesizing Titanium Dioxide/Acrylate Core-Shell Polymer ($TiO_2$/Acrylate 코어-셀 합성에서 계면활성제의 영향에 관한 연구)

  • Kim, Duck-Sool;Park, Keun-Ho
    • Journal of the Korean Applied Science and Technology
    • /
    • v.27 no.1
    • /
    • pp.56-60
    • /
    • 2010
  • Titanium dioxide particles are used as photocatalysts, sensors, adsorbents and catalyst. Core-shell polymers of inorganic/organic pair, which have both core and shell component, were synthesized by sequential emulsion polymerization using Acrylate as a shell monomer and potassium persulfate (KPS) as an initiator. We found that when Acrylate core prepared by adding 0.5~2.0 wt% EU-S133D, Titanium dioxide / Acrylate core-shell polymerization was carried out on the surface of Titanium dioxide particle without forming the new Titanium dioxide particle during acrylate shell polymerized in the inorganic/organic core-shell polymer preparation. The structure of core-shell polymer were investigated by measuring to the thermal decomposition of polymer composite using thermogravimetric analyzer(TGA) and morphology of latex by scanning electron microscope(SEM).

Biodegradation of Starch-Filled Acrylate Film by α-Amylase (전분 충전 아크릴레이트 필름의 α-Amylase에 의한 생분해)

  • Kim, Jeong Du;Yu, Su Yong;Gam, Sang Gyu;Ju, Chang Sik;Lee, Min Gyu
    • Journal of Environmental Science International
    • /
    • v.13 no.9
    • /
    • pp.827-833
    • /
    • 2004
  • The biodegradability of vinyl acetate acrylate resin and com starch blend was studied by determination of the reduced sugars produced after enzymatic hydrolysis. The starch hydrolysis reaction by $\alpha-amylase$ was achieved within 5 minutes. Optimal ranges of temperature and pH for the starch hydrolysis by $\alpha-amylase$ were around $80^{\circ}C$ and 6.5-7.2, respectively. The biodegradability of the starch-filled acrylate films increased as the content of starch increased. The biodegradation of starch in the starch-filled acrylate film by $\alpha-amylase$ was about 48.6% of that of pure starch. This value of biodegradable starch-filled acrylate film gave a good result with enzymatic shortcut test. The surface morphologies of the starch-filled acrylate film after enzymatic hydrolysis were investigated by scanning electron microscopy (SEM).