Hexanediol-diacrylate

Devaky and Rajasree have reported the production of a polymer-bound ethylenediamine-borane reagent (63) (Fig. 41) for use as a reducing agent for the reduction of aldehydes.87 The polymeric reagent was derived from a Merrifield resin and a 1,6-hexanediol diacrylate-cross-linked polystyrene resin (HDODA-PS). The borane reagent was incorporated in the polymer support by complexation with sodium borohydride. When this reducing agent was used in the competitive reduction of a 1 1 molar mixture of benzaldehyde and acetophenone, benzaldehyde was found to be selectively reduced to benzyl alcohol. 

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... 

Figure 1. Chemical structures of the monomers used in this work. Shown are a) p-phenylene diacrylate (PPDA- melting point 89° C), b) 1,6-hexanediol diacrylate (HDDA- melting point 5° C, boiling point 316° C), and c) C6M, a liquid crystalline diacrylate (phase sequence Isotropic - 116° C -> Nematic -> 86° C - Crystalline.)...

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. 

Tripropylene glycol diacrylate (TPGDA) 1,6-Hexanediol diacrylate (HDDA) Dipropylene glycol diacrylate (DPGDA)... 

Hexanediol diacrylate Dipropylene glycol diacrylate Trimethylolpropane triacrylate Trimethylolpropane ethoxytriacrylate Trimethylpropane propoxytriacrylate Pentaterythritol triacrylate Glyceryl propoxytriacrylate... 

To demonstrate the UV crosslinkability of the polymers formed having pendant acyloxyimino groups, copolymers of bisphenol diacrylate and 1,6 hexanediol diacrylate were prepared by thermal methods with 5% (by weight) of pyrene oxime acrylate and phenanthrene oxime acrylate, both of which have considerable absorption in the region of 320-360 nm. The polymerization was stopped before the gel point and the prepolymer solutions were then irradiated with light from a monochromator at the maximum of... 

Fig. 13 (a) Possible structures of hyperbranched polymer (p(X-Y)) from the conjugate addition of X (diacrylate) and Y (trifunctional amines), (b) Structures of diacrylates and trifunctional amine monomers used for the synthesis 4-(aminomethyl)piperidine) (AMP), A-methylethylenediamine (MEDA), l-(2-aminoethyl)piperazine (AEPZ), ethylene glycol diacrylate (EGDA), 1,4-butanediol diacrylate (BDDA), and 1,6-hexanediol diacrylate (HDDA). Adapted with permission from [124], Copyright 2005 Elsevier... 

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. 

A mixture consisting of silica (40 parts) previously treated with y-acryloxypropyl-trimethoxysilane, trimethylolpropane triacrylate (40 parts), 1,6-hexanediol diacrylate (20 parts), the Step 1 product (0.5 parts), and Darocure (5 parts) as the free radical initiator were spin-coated and irradiated with UV light to form a coating having a thickness of roughly 5 pm. 

Secondary amines have been found to accelerate the air saturated photocuring of 1,6-hexanediol diacrylate resin" associated with the former giving alkylamino radicals which scavenge the oxygen. The photosensitivity of a series of polyester resins to an argon ion laser has been found to... 

Hexanediol diacrylate, 1.0 mg, 2 mmol irritating to eyes and skin, may cause sensitization... 

Hexanediol diacrylate (HDODA) Trimethylolpropane triacrylate (TMPTA) Epocryl 370 VTBN 90-190... 

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). 

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