아민기로 관능화된 Poly(glycidyl methacrylate) 다공성 입자를 활용한 수용액 중 불화수소의 제거

이상구(Sang Goo Lee),하종욱(Jong-Wook Ha),박인준(In Jun Park),이수복(Soo-Bok Lee),손은호(Eun-Ho Sohn) 한국고분자학회 2016 폴리머 Vol.40 No.4

아민 화합물로 관능화된 고분자 입자를 합성하고 이를 수용액에 포함되어 있는 불화수소의 제거에 활용하였다. 다공성의 고분자 입자는 glycidyl methacrylate와 trimethylolpropane trimethacrylate 단량체를 톨루엔과 함께 현탁중합하여 제조하였으며 ethylamine을 이용하여 관능화하였다. 불화수소 제거 효율, 흡착평형, 흡착속도 등에 관한 실험을 수행하였으며, 제조된 고분자 입자는 Qe=55 mg/g 이상의 불화수소 흡착 용량을 보였다. 제조된 고분자 입자를 사용하면 acid retardation 효과에 의해 알칼리 금속불화물과 불화수소의 혼합물 수용액으로부터 불화수소를 선택적으로 제거할 수 있어 알칼리 금속불화물의 정제 공정에 적용할 수 있음을 확인하였다. In this study, the amine-functionalized macroporous polymer microspheres are applied to the removal of HF from aqueous solution. Macroporous polymer microspheres were prepared by suspension polymerizations of glycidyl methacrylate and trimethylolpropane trimethacrylate. Toluene was used as a diluent in order to make microspheres porous. These microspheres were functionalized using ethylamine. HF removal efficiency, adsorption equilibrium, and adsorption kinetics were considered experimentally. The resulting polymeric microspheres showed a high capacity for HF removal, more than Qe = 55 mg/g. Finally, the amine-functionalized microspheres were utilized in the purification of metal fluoride via acid retardation.

Synthesis and curing of poly(glycidyl methacrylate) nanoparticles

Jang, Jyongsik,Bae, Joonwon,Ko, Sungrok Wiley Subscription Services, Inc., A Wiley Company 2005 Journal of polymer science Part A, Polymer chemist Vol.43 No.11

<P>Glycidyl-functional polymer nanoparticles [poly(glycidyl methacrylate) (PGMA)] were fabricated with microemulsion polymerization. The successful fabrication of PGMA nanoparticles was confirmed by Fourier transform infrared spectroscopy and transmission electron microscopy (TEM). A TEM image showed that the average diameter of the PGMA nanoparticles was approximately 10–28 nm and was fairly monodisperse. As the surfactant concentration increased, the average size of the nanoparticles decreased and approached an asymptotic value. A significant reduction of the nanoparticle size to the nanometer scale led to an enhanced number of surface functionalities, which played an important role in the curing reaction. The PGMA nanoparticles were cured with a low-temperature curing agent, diethylene triamine, to produce ultrafine thermoset nanoparticles. The low-temperature curing process was performed below the glass-transition temperature of PGMA to prevent the coagulation and deformation of the nanoparticles. A TEM image indicated that the cured PGMA nanoparticles did not exhibit interparticle aggregation and morphological transformation during curing. The average size of the cured PGMA nanoparticles was consistent with that of the pristine PGMA nanoparticles © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 2258–2265, 2005</P> <B>Graphic Abstract</B> <P>Glycidyl-functional polymer nanoparticles with an average diameter of 10–28 nm were synthesized with microemulsion polymerization. The ultrasmall thermoset nanoparticles were fabricated through the curing reaction of poly(glycidyl methacrylate) nanoparticles with diethylene triamine at a low temperature without interparticle coagulation and morphological transformation. The average diameter of the cured nanoparticles was consistent with that of the pristine nanoparticles. <img src='wiley_img/0887624X-2005-43-11-POLA20706-gra001.gif' alt='wiley_img/0887624X-2005-43-11-POLA20706-gra001'> </P>

Radiolytic Immobilization of Lipase on Poly(glycidyl methacrylate )-grafted Polyethylene Microbeads

Choi Seong-Ho,Lee Kwang-Pill,Kang Hee-Dong,Park Hyun Gyu The Polymer Society of Korea 2004 Macromolecular Research Vol.12 No.6

Poly(glycidyl methacrylate)-grafted polyethylene microbeads (POPM) presenting epoxy groups were prepared by radiation-induced graft polymerization of glycidyl methacrylate on the polyethylene microbead. The obtained POPM was characterized by IR spectroscopic, X-ray photoelectrons spectroscopy (XPS), scanning electron microscope (SEM), and thermal analyses. Furthermore, the abundance of epoxy groups on the POPM was determined by titration and elemental analysis after amination. The epoxy group content was calculated to be in the range 0.29-0.34 mmol/g when using the titration method, but in the range 0.53-0.59 mmol./g when using elemental analysis (EA) after amination. The lipase was immobilized to the epoxy groups of the POPM under various experi­mental conditions, including changes to the pH and the epoxy group content. The activity of the lipase-immobilized POPM was in the range from 160 to 500 unit/mg-min. The activity of the lipase-immobilized POPM increased upon increasing the epoxy group content. The lipase-immobilized POPM was characterized additionally by SEM, elec­tron spectroscopy for chemical analysis (ESCA), and EA.

Graphene oxide as a Pickering emulsifier for poly(glycidyl methacrylate) composite particles and their suspension rheology under applied electric fields

Lee, Chul Joo,Choi, Hyoung Jin Elsevier 2018 Colloids and surfaces. A, Physicochemical and engi Vol.550 No.-

<P><B>Abstract</B></P> <P>Electro-responsive smart poly(glycidyl methacrylate) (PGMA)/graphene oxide (GO) composite particles were synthesized using Pickering emulsion polymerization, in which the GO sheets simultaneously performed two roles, as a shell in a core-shell structure and a solid Pickering emulsifier. While the morphology of the synthesized PGMA/GO particles was examined via both transmission electron microscopy and high-resolution scanning electron microscopy, their chemical structural bonding and thermal stability were examined using Fourier transform infrared spectroscopy and thermo gravimetric analysis, respectively. The electrorheological (ER) features of PGMA/GO particle-based ER fluids dispersed in a silicone oil were studied by a rotational rheometer with various electric fields supplied by a high-voltage power generator. The experimental flow curve of the shear stress fitted well with the Bingham fluid model. To obtain additional information about the relationship between their ER behaviors and dielectric properties, the dielectric spectra were examined using a LCR meter and found to fit well with the Cole-Cole equation.</P> <P><B>Graphical abstract</B></P> <P>Poly(glycidyl methacrylate) (PGMA)/graphene oxide (GO) microspheres were synthesized through Pickering emulsion polymerization and then applied for an electrorheological (ER) fluid. Here, GO prepared from modified Hummers method was used as both a solid stabilizer and an ER activator. ER characteristics and dielectric properties of fabricated PGMA/GO were investigated in detail.</P> <P>[DISPLAY OMISSION]</P>

PPS/PET 및 PPS/PA66 블렌드에 대한 상용화제의 영향

배꽃하얀,함명조,김영호,Bae, Ggot-Ha-Yan,Ham, Myong-Jo,Kim, Young-Ho 한국섬유공학회 2012 한국섬유공학회지 Vol.49 No.1

Two commercial compatibilizers of ethylene glycidyl methacrylate (EGMA) and styrene-b-ethylene/butyleneb-styrene grafted with maleic anhydride (SEBS-g-MA) were added to poly(phenylene sulfide) (PPS)/poly(ethylene terephthalate) (PET) (80/20, weight ratio) and PPS/polyamide 66 (PA66) (80/20, weight ratio) mixture, respectively. This was done by using a twin screw extruder via a melt blending method and the blends of the three components were melt-pressed and quenched to the films of 200 ${\mu}m$. Changes in thermal, mechanical, chemical and morphological properties of the blend films were analyzed by using DSC, DMA, WAXS, SEM and UTM. DSC results showed that EGMA in PPS(80)/PET(20)/EGMA blends lowered $T_g$ of PPS. They hindered the crystallization of both PPS and PET. Addition of EGMA imparted partial miscibility to the immiscible PPS(80)/PET(20) blends but the total miscibility and compatibility were not enhanced. Mechanical and chemical properties of PPS80/PET20/EGMA blend films deteriorated more with an increase in EGMA content. SEBS-g-MA did not work as a compatibilizer at all for PPS(80)/PA66(20) blends rather it enduced phase separation of the blends.

Poly(glycidyl methacrylate) Coated Soft-Magnetic Carbonyl Iron/Silicone Rubber Composite Elastomer and Its Magnetorheology

권승혁,안지수,최소연,정경호,최형진 한국고분자학회 2019 Macromolecular Research Vol.27 No.5

Poly(glycidyl methacrylate) (PGMA) coated soft-magnetic carbonyl iron (CI) particles were fabricated using a dispersion polymerization method in this study and then adopted for a magnetorheological (MR) elastomer. Physical characteristics of the fabricated PGMA coated CI particles, including morphology and magnetic properties, were analyzed by scanning electron microscopy, energy dispersive X-ray spectroscopy, and vibrating sample magnetometer. MR elastomers were prepared using silicone rubber with both PGMA-coated and uncoated CI particles. Rheological properties of the MR elastomer samples, including storage modulus and relative MR efficiency, were measured with a rotational rheometer at various magnetic field strengths. The results demonstrated that the PGMA-coated CI based MR elastomer sample had larger storage modulus, smaller MR effect, smaller Payne effect, and smaller loss tangent than the pure CI based MR elastomer due to increased bond strength between the particles and silicone rubber matrix for the PGMA-coated CI based MR elastomer.

PGMAcr 표면을 이용한 액정배향 효과

황정연,김준영,서대식,김태호 한국전기전자재료학회 2003 전기전자재료학회논문지 Vol.16 No.11

A photoalignment material of a PGMAcr, poly[3-(acryloyloxy)-2-hydroxypropyl methacrylate] using a photopolymerized the acrylate unit by photo-initiator and a PGMA4Ch, poly[3(4-chalconyloxy)-2-hydroxypropyl methacrylate] using a photodimerization by chalcone group were synthesized. Also, the liquid crystal (LC) aligning capabilities on the photopolymer layers were studied. A good LC alignment with UV exposure on the PGMAcr surface can be obtained. However, the LC alignment defects were observed on the PGMA4Ch surface. The LC aligning capabilities of the PGMAcr surface by photo-initiator were better than that of the PGMA4Ch surface by chalcone group as photosensitive moiety.

Crosslinking behaviors and mechanical properties of curable PDMS and PEG films with various contents of glycidyl methacrylate

Kim, N. H.,Yoon, S.,Jung, K. I.,Lee, D. G.,Bang, J.,Jung, H. W. John Wiley Sons, Inc. 2019 Journal of applied polymer science Vol.136 No.7

<P><B>ABSTRACT</B></P><P>The real‐time curing behaviors and surface mechanical properties of two curable systems, polydimethylsiloxane (PDMS) and poly(ethylene glycol) (PEG) films containing different portions of glycidyl methacrylate (GMA), were investigated via various measurements for potential application as anti‐fouling coatings. In these mixtures, methacryloxypropyl‐terminated PDMS and poly(ethylene glycol)dimethacrylate were used as the difunctional crosslinkers, and GMA was employed as the epoxy component. During the coating process, UV irradiation generated network structures for both mixtures (PDMS‐GMA and PEG‐GMA), while they exhibited the different evolution of the elastic modulus with respect to the GMA content. It was found that a small portion of the crosslinkers formed at early stage has a dominant contribution to the overall film properties, leading to a small swelling ratio and large gel fraction. The indentation and scratch mechanical properties of the cured films were qualitatively well linked with the real‐time rheological data for the curable mixtures acquired during the curing process. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. <B>2019</B>, <I>136</I>, 47088.</P>

Radiolytic Immobilization of Lipase on Poly(glycidyl methacrylate)-grafted Polyethylene Microbeads

Seong Ho Choi,Kwang PiIl Lee,Hee Dong Kang,Hyun Gyu Park 한국고분자학회 2004 Macromolecular Research Vol.12 No.6

Preparation of Affinity Column Based on ZR⁴⁺ Ion forPhosphoproteins Isolation

Lee, Seon-Mi,Bae, In-Ae,Park, Jung-Hyen,Kim, Tae-Dong,Choi, Seong-Ho Korean Chemical Society 2009 대한화학회지 Vol.53 No.3

This paper has described about preparation of $Zr^{4+}$ affinity column based on the poly(styrene-co- gly-cidyl methacrylate) prepared by emulsion polymerization of styrene and glycidyl methacrylate in order to isolate phosphopeptide. The $Zr^{4+}$ ions were introduced after the phophonation of an epoxy group on polymeric microspheres. The successful preparation of $Zr^{4+}$-immobilized polymeric microsphere stationary phase was confirmed through Fourier transform infrared spectra, optical microscopy, scanning electron microscopy, X-ray photoelectron spectra and inductively coupled plasma-atomic emission spectrometer. The separation efficiency for $Zr^{4+}$ affinity column prepared by slurry packing was tested to phosphonated casein and dephosphonated casein. The resolution time (min) of the phosphonated casein was higher than that of dephosphated casein for $Zr^{4+}$ affinity polymeric microsphere by liquid chromatography. This $Zr^{4+}$ affinity column can be used for isolation of phosphonated casein from casein using liquid chromatography.