1,6-Hexanediol diacrylate properties

The amorphous diacrylate monomers chosen for study were two commercially available monomers, p-phenylene diacrylate (PPDA) and 1,6-hexanediol diacrylate (HDDA) (Polysciences, Inc., Warrington, PA). The liquid crystalline diacrylate studied was 1,4-di-(4-(6-acryloyloxyhexyloxy)benzoyloxy)-2-methylbenzene (C6M) (13). Chemical structures of these monomers as well as pertinent physical and LC properties are given in Figure 1. All monomers were used without further purification. The ferroelectric liquid crystal mixture consisted of a 1 1 mixture of W7 and W82 (1) (Displaytech, Boulder, CO). This mixture exhibits isotropic (I), smectic A... 

With a somewhat stiffer monomer, 1,6-hexanediol diacrylate, (HDDA) we have previously observed that the ultimate conversion as measured with differential scanning calorimetry (DSC) also depends on light intensity. This has been attributed to the experimentally observed delay of shrinkage with respect to chemical conversion (7). In principle, such a dependence of conversion on intensity should show up in the mechanical properties as well. However, these are difficult to measure with thin samples of HDDA. 

The effect of irradiation dose and different polyfunctional monomers(PFMs) at a constant ratio of 10 phr on the physicochemical properties of a PVC formulation used as wire coating was investigated. The PFMs used were trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, ethylene glycol dimethacrylate, diethylene glycol diacrylate, pentaerythritol tetraacrylate, triallyl cyanurate and 1,6-hexanediol diacrylate. The properties studied included tensile properties at room and elevated temps., softening temp., swelling characteristics and volume resistivity. 18 refs. 

The effect of concentration of reactive diluent, namely, 1, 6-hexanediol diacrylate (HDDA), on the EB curing behavior and some of the important properties of the coatings based on bisphenol A diglycidyl ether diacrylate resin (BDGDA) have been investigated and presented in this section (Kumar et al. 2006). 

Properties Wh. cryst. flakes sol. (g/100 g) > 50% in acetone, butyl acetate, toluene, 40% in hexanediol diacrylate, 30% in methanol insol. in water m.w. 182 sp. gr. 1.1 g/cm (20 C) m.p. 47-49 C Storage Store at room temps. < 30 C in a dry area extended exposure to elevated temps, or visible light could reduce prod, life keep prod, away from ignition sources Benaqua 1000 [Elementis Spec. U.S.]... 

Properties Wh. fine powd. low odor sol. in 1,6-hexanediol diacrylate, trimethylolpropane triacrylate, tetraethylene glycol diacrylate negligible sol. in water m.w. 25,000 sp.gr. 1.23 vise, 1,52 poise vapor pressure negligible m.p. 188-210 C ref. index 1.475 Tukon hardness 23 100% solids 2.5% acetyl, 45% propionyl... 

Properties Solid sol. in butyl Cellosolve acetate, 2-phenoxyethyl methacrylate, tetrahydrofurfuryl acrylate, ethoxylateds bisphenol Adiacrylate, propoxylated allyl methacrylate, tetrahydrofurfuryl mefhacrylate, epoxy acrylate oligomer blended with 1,6 hexanediol diacrylate m.p. 78 C ret. index 1.475 0.01% acid C[M06 [Sartomer]... 

Chem. Descrip. 2,2-Dimethoxy-2-phenylacetophenone CAS 2465042-8 EINECS/ELINCS 246-386-6 Uses Photoinitiator tor UV-curable coatings, adhesives, inks, and printing plates, for unsat. polyester and acrylate systems Properties Wh. cryst. solid sol. > 50% w/v in methyl methacrylate, styrene, 31% in 2-hydroxyethylacrylate, 30% in 1,6-hexanediol diacrylate, 26% in aromatic urethane diacrylate, 23% in propylene glycol diacrylate, 20% in DOP m.p. 63-68 C 99.5% min. assay Use Level 1-4%... 

Properties Yel. cryst. powd. sol. 43% w/v in methyl methacrylate, 25% in 1,6-hexanediol diacrylate, 24% in aromatic urethane diacrylate, 16% in propylene glycol diacrylate 98% min. assay Use Level 0.25-1.5%... 

We can also classify the systems based on the states of the reactants and products. Monofunctional monomers such as benzyl acrylate are liquids and produce liquid polymers, and we call these Tiquid/liquid systems. Figure 1 shows a schematic of the changes in properties across a liquid/liquid front. Multifunctional monomers such as 1, 6 hexanediol diacrylate (HDDA) are liquid but produce a thermoset, solid product, and these we call liquid/solid systems. Finally, solid monomers such as acrylamide (8,25) and transition metal nitrate complexes of acrylamide (26-28) can be polymerized frontally in solid/solid systems. 

Khan, M.A., Shehrzade, S., and Hassan, M.M. (2004) Effect of alkali and ultraviolet (UV) radiation pretreatment on physical and mechanical properties of 1,6-hexanediol diacrylate-grafted jute yarn by UV radiation. J. Appl. Polym. Sci., 92, 18-24. 

Properties Wh. crysf. powd. sol. in butyl acetate, dipropylene glycol diacrylate, hexanediol diactylate, isoborn acrylate insol. in water m.w. 204 sp.gr. 1.17 (20 C) m.p. 47-49 C 99.0% min. assay Precaution Can form an ignitable vapor/air mixt. take precautions against static discharges... 

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