Trimethylol propane triacrylate

The reactive extrusion of polypropylene-natural rubber blends in the presence of a peroxide (1,3-bis(/-butyl per-oxy benzene) and a coagent (trimethylol propane triacrylate) was reported by Yoon et al. [64]. The effect of the concentration of the peroxide and the coagent was evaiuated in terms of thermal, morphological, melt, and mechanical properties. The low shear viscosity of the blends increased with the increase in peroxide content initially, and beyond 0.02 phr the viscosity decreased with peroxide content (Fig. 9). The melt viscosity increased with coagent concentration at a fixed peroxide content. The morphology of the samples indicated a decrease in domain size of the dispersed NR phase with a lower content of the peroxide, while at a higher content the domain size increases. The reduction in domain size... 

The most effective prorads for PVC are acrylic and allylic esters, such as triallyl cyanurate (TAC), trimethylolpropane trimethacrylate (TMPTMA) and trimethylol-propane triacrylate. The triacrylate is more reactive than the trimethacrylate, but is more toxic and, for that reason, is seldom used. The amounts of these additives are 1 to 5% of the formulation weight.103... 

It is reasonable to expect that in a viscous monomer such as trimethylol-propane triacrylate (>/ = 65 cp), bimolecular termination reactions proceed more slowly than in monofunctional monomers. However, considering the long lifetime observed for the polymer radicals in these monomers, caution must be exercised in the interpretation of the linear intensity dependence. Long-lived radicals are more likely to terminate by chain transfer and... 

Transmission electron microscopy Tetrahydrofuran Trimethylol-propane triacrylate Cell proliferation kit... 

Leong et al. evaluated a hyperbranched poly(amino ester) synthesized in a novel A3+2BB B approach by Michael addition polymerization of trimethylol-propane triacrylate (TMPTA) (A3-type monomer, triacrylate), with a double molar of l-(2-aminoethyl) piperazine (AEPZ) (BB B -type monomer, trifunctional amine) (Fig. 11) [127]. To check its DNA condensation behavior and cytotoxicity, the poly(TMPTAl-AEPZ2) obtained was protonated. Due to the protonation ability of... 

Trimethylol propane triacrylate Trimethylol propane trimethacrylate Tetramethyl thiuram disulphide Total correlation spectroscopy Time-of-flight MS Thermoplastic elastomer(s)... 

TABLE 1. Components used in preparing porogen particles which were compatible with the B-staged henzocyclohutene dielectric materials after crosslinking with 10% trimethylol-propane triacrylate. 

NPGDA), trimethylol propane triacrylate (TMPTA), Trigonal 14 (Noury Chem. Corp. mixture of benzoin butyl ethers), benzoyl peroxide, and t-butyl perbenzoate were used as obtained from commercial suppliers without further purification. 

Peroxide initiated polymerizations (scan 30°-250°C) of lauryl acrylate (LA), I,6-hexanediol diacrylate (HDDA), neopentyl glycol diacrylate (NPGDA), and trimethylol propane triacrylate (TMPTA) revealed total polymerization heats per mole of C=C of 19.2, 17.6, 16,7, and 15.4 kcal, respectively. PhotoactIvated Trigonal 14 initiated polymerizations at 40° yielded total polymerization heats per mole of C=C of 17.4, 11.7, 8.2, and 9.1 kcal for LA, HDDA, NPGDA, and TMPTA, respectively. At 60°C the photopolymerization heats for the latter three monomers increased to 16.6, 9.7, and 10.2 kcal per mole of C=C, respectively. 

Figure 2. Effect of trimethylol propane triacrylate on grafting of styrene to polyethylene film in methanol at dose rate of 4.1 X 10 rad/h to 2 A X 10 rad. Key O, styrene-methanol , styrene-methanol-trimethylol propane triacrylate (1%...

Table III with Acid. Comparison of Trimethylol Propane Triacrylate (TMPTA) as Additives in Styrene Grafting to Polyethylene ...

Three photopolymerizable primer monomers, namely the linear hexanediol diacrylate (HDDA), the branched trimethylol propane triacrylate (TMPTA), and the linear tripropyleneglycol diacrylate (TPGDA), and a model of a linear unsaturated polyester/ alkyd varnish repeating unit were used for the study. A model of the two top chains of an elementary cellulose I crystallite was used as a substrate, the refined conformation of which had already been reported [12]. 

Some acrylate monomers are acrylic acid, butyl acrylate, 2-ethylhexyl acrylate, methyl acrylate, ethyl acrylate, acrylonitrile, n-butanol, methyl methacrylate (plexiglas) and trimethylol propane triacrylate (TMPTA). 

The second kind is that of polyfunctional agents that could promote cross-linking (against chain scissioning). Trimethylol propane trimethacrylate (TMPTMA), trimethylol propane triacrylate (TMPTA) or triallyl isocyanurate (TAIC) belong to this category (Figure 9.3). 

Dubey et compared the efficiency of different additives to promote the cross-linking of a nonmiscible ethylene propylene diene monomer rubber (EPDM)/styrene-ethlene/butylene-styrene copolymer (SEES) blend y-irradiated between 50 and 500 kGy ethyleneglycol dimethacrylate styrene-ethylene/ butylene-styrene copolymer (EGDMA), tri(propylene glycol) diacrylate (TRPGDA), trimethylol propane triacrylate (TMPTA), and trimethylol propane... 

Polychrome Corp. Castor Oil - hydroxyethyl acrylate -toluene diisocyanate reaction product and trimethylol propane triacrylate cured using DEAP and UV. 180 peel (1.5 mil polyester substrate) of 25-30 oz. Shear 8 hr. (500g.)... 

Fig. 4. Monomer/Cross-linker Viscosities and Solution Viscosities of Urethane Polymers in 1,6HDDA or NVP as a Function of Polymer Concentration (PETA -pentaerythritol triacrylate, TMPTA - trimethylol propane triacrylate, NPGDG - neopentyl glycol diacrylate, DEGDA - diethylene glycol diacrylate, QM657 - Rohm and Haas - dicyclo- pentadiene modified acrylate, IBA - isobornyl acrylate, 1,6HDDA - 1,6 hexanediol diacrylate, NVP - N-vinylpyrrolidone, 2EHA-2-ethylhexyl acrylate)...

Maruyama et al, studied photopolymerization of addition products of multifunctional acrylates and aUcoxysilyl alkyl thiol. Three monomers with multiple (trimethoxysilyl)propylthio groups were prepared by them via Michael addition of the multifunctional acrylates. These were neopentyl glycol diacrylate, trimethylol propane triacrylate, and pentaerythritol tetraacrylate that were reacted with (y-mercaptopropyl)trimethoxysilane. These photocurable oligomers were then UV-irradiated using photo cationic and photo radical initiators. They found that polymerization with photo cationic initiator provided films with a high hardness and mar resistance. ... 

PET/EP-g-GMA Internal mixer/rheology/SEM/ DMA/FTIR/Molau test/EP functionalized with GMA in the presence of trimethylol propane triacrylate/comparison to blends containing unfunctionalized EP or EP functionalized with GMA in absence of triacrylate Al-Malaika and Kong 2005... 

Copolymer from methyl methacrylate and butyl acrylate Copolymer from methyl methacrylate, butyl acrylate, diallyl maleate, and trimethylol propane triacrylate Methyl methacrylate-ethyl acrylate copolymer Methyl methacrylate-methyl acrylate copolymer Methyl methacrylate-co-A -phenylmaleimide copolymer Copolymer from methyl methacrylate and a-methyl styrene Methyl methacrylate-vinyl acetate copolymer Copolymer of methyl methacrylate, vinyl acetate, and acrylic acid... 

---