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Polymerization of 2-hydroxyethyl

POLYMERIZATION OF 2-HYDROXYETHYL METHACRYLATE (HEMA) AND METHYL METHACRYLATE (MMA)... [Pg.297]

Surface polymerization of 2-hydroxyethyl methacrylate (HEMA), which possessed a functional group, at the initiation sites on the molded sheet of the PP macroinitiator was performed by Matsuo et al. using the ATRP-mediated CuBr/PMDETA catalyst system [148]. The molded PP sheet (d = 1.0 mm) was prepared by a molding press from PP-Br, which was synthesized by bromina-tion of propylene/10-undecen-l-ol copolymer (PP-OH Mn = 15 500, [-OH] = 3.8 units/chain). The ATRP of HEMA was carried out on the molded PP-Br... [Pg.112]

Most research into the study of dispersion polymerization involves common vinyl monomers such as styrene, (meth)acrylates, and their copolymers with stabilizers like polyvinylpyrrolidone (PVP) [33-40], poly(acrylic acid) (PAA) [18,41],poly(methacrylicacid) [42],or hydroxypropylcellulose (HPC) [43,44] in polar media (usually alcohols). However, dispersion polymerization is also used widely to prepare functional microspheres in different media [45, 46]. Some recent examples of these preparations include the (co-)polymerization of 2-hydroxyethyl methacrylate (HEMA) [47,48],4-vinylpyridine (4VP) [49], glycidyl methacrylate (GMA) [50-53], acrylamide (AAm) [54, 55], chloro-methylstyrene (CMS) [56, 57], vinylpyrrolidone (VPy) [58], Boc-p-amino-styrene (Boc-AMST) [59],andAT-vinylcarbazole (NVC) [60] (Table 1). Dispersion polymerization is usually carried out in organic liquids such as alcohols and cyclohexane, or mixed solvent-nonsolvents such as 2-butanol-toluene, alcohol-toluene, DMF-toluene, DMF-methanol, and ethanol-DMSO. In addition to conventional PVP, PAA, and PHC as dispersant, poly(vinyl methyl ether) (PVME) [54], partially hydrolyzed poly(vinyl alcohol) (hydrolysis=35%) [61], and poly(2-(dimethylamino)ethyl methacrylate-fo-butyl methacrylate)... [Pg.303]

Indeed, photopolymerization of acrylamide in aqueous solution on cell-GEHMP gives cellulose with the surface covered by a poly acrylamide) gel. Similarly, UV initiated polymerization of 2-hydroxyethyl acrylate, 2-(dimethylamino) ethyl methacrylate and A -vinylpyrrolidone carried out with the above functionalized Si(>2 results in the formation of a surfece polymer coating. [Pg.194]

Fig. 22. Monomer concentration dependence in various solvents of the rate of polymerization of 2-hydroxyethyl methacrylate (HEMA) by plasma (O, , ) and UV (A) exposure [176]. Plasma 100 W, s postpdymerization. 25 °C. UV 400 W mercury lamp in-source polymerization, 25 °C. Solvent G. A, water , ethand 03, DMSO... Fig. 22. Monomer concentration dependence in various solvents of the rate of polymerization of 2-hydroxyethyl methacrylate (HEMA) by plasma (O, , ) and UV (A) exposure [176]. Plasma 100 W, s postpdymerization. 25 °C. UV 400 W mercury lamp in-source polymerization, 25 °C. Solvent G. A, water , ethand 03, DMSO...
The first example of ATRP initiated by an oligopeptide macroinitiator was reported in early 2004 by Mei et a/. " who studied the solid-phase-supported polymerization of 2-hydroxyethyl methacrylate (HEMA). The resulting RGD-blocfe-poly(2-hydroxyethyl methacrylate) (pHEMA) bioconjugate carried one of the functional binding domains of the fibronectin adhesion protein to modulate cell adhesion onto polymer coatings. Analysis of the final product after liberation from the support revealed a polydispersity index of 1.47. [Pg.555]

Also, the polymerization of 2-hydroxyethyl methacrylate in a methanol solution proceeds efficiently when safranine T is used in the presence of tertiary aliphatic amines " ... [Pg.81]

The initiation mechanism of a similar three-component system, consisting of eosin, methyldiethanolamine, and diphenyliodonium chloride was also studied in the initiation of the polymerization of 2-hydroxyethyl methacrylate. The fastest polymerization occurs when all three components were present The next fastest is a combination of the dye and the amine. The slowest is a combination of the dye with the iodonium salt. In this case, it was also observed that the reaction between eosin and the iodonium salt bleaches the dye more rapidly than when the iodonium salt is included with eosin and the amine. Although a direct eosin and amine reaction can produce active radicals they are formed from the reaction with eosin in the original state. Simultaneously active initiating amine-based radicals are formed... [Pg.85]

In 1983, Teffal and Gourdene investigated the bulk polymerization of 2-hydroxyethyl methacrylate (HEMA) under conventional and microwave conditions [33]. Since HEMA bears ester as well as alcohol functions, it is a polar species... [Pg.205]

S. (2004) Gel formation in frontal polymerization of 2-hydroxyethyl methacrylate. e-Polymers, 49, 1-10. [Pg.64]

Mabilleau G, Cincu C, Basle MF, Chappard D. Polymerization of 2-(hydroxyethyl)methaciylate by two different initiator/accelerator systems a Raman spectroscopic monitoring. J Raman Spectrosc 2008 39 767-771. [Pg.132]

MA2 Ma, Z. and Lacroix-Desmazes, P., Dispersion polymerization of 2-hydroxyethyl methacrylate stabilized by a hydrophilic/C02-philic poly(ethylene oxide)-Z>-poly(l,l,2,2-tetrahydroperfluorodecyl acrylate) (PEO-Z>-PFDA) diblock copolymer in supercritical carbon dioxide (experimental data by P. Lacroix-Desmazes), Polymer, 45,6789, 2004. [Pg.459]

Sasaki, X., Ratner, B.D., Hoffman, A.S. Radiation-induced co-graft polymerization of 2-hydroxyethyl methacrylate and ethyl methacrylate onto silicone rubber films. In Abstracts of Papers of ACS. ACS, Washington, DC, Jan 1975... [Pg.503]

Microwave irradiation has been applied to free-radical polymerization and copolymerization reactions of various unsaturated monomers. In the 1980s, the bulk polymerization of 2-hydroxyethyl methacrylate (HEMA), which is a polar spe-des that bears ester as well as alcohol functions capable of interacting and absorbing microwaves, was investigated. Thus, the reactions were carried out without any radical initiator, and the liquid monomer polymerized to form a solid material that was insoluble in all the common solvents ... [Pg.985]


See other pages where Polymerization of 2-hydroxyethyl is mentioned: [Pg.79]    [Pg.96]    [Pg.51]    [Pg.73]    [Pg.182]    [Pg.462]    [Pg.96]    [Pg.60]    [Pg.531]    [Pg.3122]    [Pg.84]    [Pg.65]    [Pg.1936]    [Pg.162]    [Pg.122]    [Pg.207]    [Pg.1080]   


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Hydroxyethylation

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