Microphase separated structures based on N-substituted polydiallylamines

Structure and Dielectric Behavior of block Copolymers Containing an LC Polyacrylate Block

“…At the same time, one can see (Table ) that similarly to what is shown in Talroze et al the solubility of the polymerization products depends on the polymerization reaction conditions. With increases in the temperature (60 °C) and macroinitiator−acrylic monomer ratio, the resultant product becomes soluble in the boiling benzene/methanol (5:3 vol/vol) mixture.…”

“…As shown in Dragalova et al, 7 this double bond may be activated and start the radical polymerization of vinyl monomers at an elevated temperature. As shown in Talroze et al, 8 the high yield of the copolymer product when the acrylic monomer, cetylacrylate, is polymerized in the presence of the PDADMACl macroinitiator may be achieved if the copolymerization reaction proceeds at 30 °C in the methanol solution. That is why the copolymerization of PDADMACl and the mesogen-containing acrylic monomer was carried out at the same conditions.…”

“…The absence of any sign of the crystalline structure of PDADMACl in copolymer 2 agrees well with prior observations that the crystallization of the PDADMACl block is essentially restricted under the influence of the long crystallizable block of the acrylic polymer-like polycetylacrylate. 8 In our case, we deal only with the nematic, ordered acrylic system, but even here, the lengthening of the acrylic block makes impossible the crystallization of the hydrophilic block. In contrast to that for copolymer 1, the thermomechanical curve for copolymer 2 (Figure 3, curve 2) shows a slight deformation of the material right above T g .…”

“…It is known that a degradative chain transfer of a monomer during the radical cyclopolymerization of N , N -diallyl- N , N -dimethylammonium chloride results in the formation of a terminal double bond . The approach developed by Dragalova et al permits the activation of this double bond in the presence of the peroxide-containing radical initiator, and such a macromolecular compound with the immobilized peroxide may be used as the macroinitiator (or precursor) …”

“…6 The approach developed by Dragalova et al 7 permits the activation of this double bond in the presence of the peroxide-containing radical initiator, and such a macromolecular compound with the immobilized peroxide may be used as the macroinitiator (or precursor). 8 The object of this work was to apply this approach for the preparation of block-copolymers based on a water-soluble PDADMACl and LC polyacrylate-poly-[p-( -acryloyloxycaproyloxy)-p′-methoxyphenylbenzoate)] [PA(OCH3)] to find the main regularities for the synthesis of LC copolymers with the controlled hydrophilic-hydrophobic balance and to understand the mutual influence of the components on the phase behavior, structure, and morphology of block-copolymers as a whole as well as on the dynamic behavior of the LC component.…”