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Polymerization trimethylolpropane triacrylate

Affinito [2] vapor coated hexanediol diacrylate, trimethylolpropane triacrylate, and tripropyleneglycol diacrylate hquid monomers at roughly 80°C and 1 X 10 torr onto polyethylene terephtholate and then radiation polymerized the surface using electron beam radiation. [Pg.122]

The use of lasers to initiate the polymerization of both monofunctional and multifunctional monomers has been reported in a number of papers during the past decade. Decker (1) was the first to demonstrate that pulsed lasers could be effectively used to obtain relatively high degrees of polymerization for trimethylolpropane triacrylate. He showed that even for pulsed lasers which deliver up to gigawatts of peak power, polymerization could be effectively carried out over a wide range of conditions (1). [Pg.429]

In recent reports (2-7), it has been shown that it is important to consider the effect of such laser operating parameters as pulse repetition rate on the polymerization kinetics. It was clearly demonstrated that pulsing the laser at narrow time intervals on the order of the lifetime of growing polymer radical chains resulted in a premature chain termination due to injection of small molecule "terminator" radicals into the system. In this paper we focus on the effect of pulse repetition rate on the polymerization of multifunctional acrylates, in particular 1,6-hexanediol diacrylate (HDODA) and trimethylolpropane triacrylate (TMPTA). [Pg.429]

Some of the multifunctional crosslinking monomers used in emulsion polymerization include pentaerythritol tetraacrylate and trimethylolpropane triacrylate (high boiling, low viscosity, fast cure system for vinyl acrylic latex paints) [34]. [Pg.122]

The method of the multifunctional initiator was used for the synthesis of 3- and 4-arm stars. Trimethylolpropane triacrylate was converted to a silyl enol ether capable of initiating the polymerization of ethyl acrylate to form the corresponding 3-arm star " (Scheme 50). [Pg.57]

Also, cross-linked polyesters can be easily made by reaction of CKAs with vinyl cross-linkers with more than one double bond. In one of the studies, porous monolithic supports for tissue engineering were made by electron-beam-initiated free-radical polymerization of 2-methylene-4-phenyl-l,3-dioxolane with trimethylolpropane triacrylate as a cross linker [24]. [Pg.31]

Also, free radieal photoinitiation of polymerization of multifunctional acrylate monomers (trimethylolpropane triacrylate and phthalic diglycol diacrylate) was reported to take place by a cationic cyanine dye-borate eomplex 1,3,3, r,3, 3 —hexamethyl-11 -chloro-10,12-propylene tricarbocyanine friphenyl-butyl borate. The dye-borate complex was illustrated as follows ... [Pg.87]

A combination of benzophenone and 1,3-dioxane is a convenient hydrogen abstraction-type photoinitiator system for the free radical photopolymerization of methyl methacrylate, styrene and other monomers. As an advantage, this system does not require an additional hydrogen donor as other conventional initiators. In a similar way, mixtures of thioxanthone derivatives and fluorenes can be used as visible light absorbing oil- and water-soluble photoinitiators for free radical polymerization of methyl methacrylate, ethyl 2-(2-phosphonoethoxymethyl)acrylate and trimethylolpropane triacrylate. Photopolymerization and laser flash photolysis studies reveal that initiation occurs by intra- and intermolecular hydrogen abstraction by the thioxanthone-like triplet excited state. [Pg.150]

Figure 4.18 A spin mode on the surface of a spherically expanding front of trimethylolpropane triacrylate polymerization. Figure 4.18 A spin mode on the surface of a spherically expanding front of trimethylolpropane triacrylate polymerization.
In addition to intrinsic interest in the different modes of polymerization, attempts to commercialize FP are affected. Consider Figure 4.19, which shows a putty prepared from trimethylolpropane triacrylate with 40% aluminum oxide. On the left, the unreacted material was extmded into a cyhnder. The front was initiated at the end nearest to the bottom of the image. The product had the appearance of a fuzzy caterpillar. It is not clear whether the pattern results from only a pulsating... [Pg.61]

Huh, D.S. and Kim, H.S. (2003) Bistability of propagating front with spin-mode in a frontal polymerization of trimethylolpropane triacrylate. Polym. Int., 52, 1900-1904. [Pg.67]

Polymerizations of multifunctional monomers of suitable unequal reactivity have been proved to be feasible for preparing hyperbranched polymers. Wu et al. [163] have reported in situ C NMR monitoring of the synthesis of hyperbranched poly(aminoester)s prepared via the Michael addition polymerization of a triacrylate, trimethylolpropane triacrylate (TMPTA) (A3-type monomer) with a double molar l-(2-aminoethyl)piperazine (AEPZ) (BB B"-type monomer) in chloroform at room temperature. [Pg.217]

Fig. 1 Polymerization profiles of (A) trimethylolpropane triacrylate (TMPTA) using different photoinitiating systems (1) Irgacure 819 (0.5% w/w) or (2) Irgacure 819/(TMS)3SiH (0.5%/3% w/w) upon a LED(3385 nm exposure. (B) (3,4-Epoxycyclohexane)methyl 3,4-epoxycyclohexylcarboxylate (EPOX) using different photoinitiating systems (1) a Michler ketone derivative/iodonium salt or (2) a Michler ketone derivative/iodonium salt/(TMS)3SiH upon excitation by a laser diode at 532 nm. ... Fig. 1 Polymerization profiles of (A) trimethylolpropane triacrylate (TMPTA) using different photoinitiating systems (1) Irgacure 819 (0.5% w/w) or (2) Irgacure 819/(TMS)3SiH (0.5%/3% w/w) upon a LED(3385 nm exposure. (B) (3,4-Epoxycyclohexane)methyl 3,4-epoxycyclohexylcarboxylate (EPOX) using different photoinitiating systems (1) a Michler ketone derivative/iodonium salt or (2) a Michler ketone derivative/iodonium salt/(TMS)3SiH upon excitation by a laser diode at 532 nm. ...
Two examples of the core-first approach for the synthesis of star polymers by GTP have been reported. Trimethylolpropane triacrylate is converted to a silyl enol ether that is used to initiate the polymerization of ethyl acrylate (Scheme 6). A pol)aner with a = 2190 and MJM = 1.39 was obtained [9]. A cyclic tetramer of methyl hydrogen siloxane was converted to a core containing four initiating groups using a Pt-catalyzed hydrosilylation reaction. The tetrafiinctional initiator was used to initiate the polymerization of MMA to form a four-arm star PMMA (Scheme 7), with about 20 to 150 MMA repeat... [Pg.71]

Figure 4.4 Repair of a hole in wood by frontal polymerization. The formulation was composed of 44% mass of a solution containing 3 phr Luperox 231 in trimethylolpropane ethoxylate triacrylate (1/1 EO/OH) (M 428), 15% mass of a solution of 3 phr Luperox 231 in TMPTA-n, and 41% mass Polygloss 90. Figure 4.4 Repair of a hole in wood by frontal polymerization. The formulation was composed of 44% mass of a solution containing 3 phr Luperox 231 in trimethylolpropane ethoxylate triacrylate (1/1 EO/OH) (M 428), 15% mass of a solution of 3 phr Luperox 231 in TMPTA-n, and 41% mass Polygloss 90.

See other pages where Polymerization trimethylolpropane triacrylate is mentioned: [Pg.865]    [Pg.188]    [Pg.159]    [Pg.241]    [Pg.307]    [Pg.159]    [Pg.504]    [Pg.436]    [Pg.1305]    [Pg.109]    [Pg.418]    [Pg.435]    [Pg.213]    [Pg.138]    [Pg.13]    [Pg.213]    [Pg.55]    [Pg.143]    [Pg.623]    [Pg.161]    [Pg.33]    [Pg.125]    [Pg.2022]    [Pg.1436]    [Pg.1526]   
See also in sourсe #XX -- [ Pg.61 ]




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