Polymerization in liquid crystals. XIII. Copolymerization of mesogenic monomers

Hardy, G.; Cser, F.; Nyitrai, K.; Bartha, Emerich

doi:10.1021/i300006a026

Cited by 6 publications

References 17 publications

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The Effect of the Structural Elements on the Properties of Side Chain Mesomorphic Polymers

Cser¹,

Horvath²,

Nyitrai³

et al. 1985

Israel Journal of Chemistry

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The thermal properties of mesomorphic polymers depend on the relative amounts of the different structural elements (hard core, flexible chains, main chain) of the polymer. Literature data are compared with the conclusions obtained from the three‐component thermodynamic model of side chain mesomorphic polymers. The effects of the different soft elements (main chain, spacer and p‐alkyl or alkoxy chain) depend first of all on the length of the spacer and its interaction with the main chain. The thermal properties of the polymer can be well regulated by varying the different structural elements of the homo‐ and co‐polymers. The glass transition temperature (Tg) of the polymer can be reduced by building O and N atoms into the main chain and/or by binding the side chains on 3rd, 4th, etc. atoms of the main chain. The Tg can be further reduced by increasing the length of the spacer. If the spacers are long enough, the layer type structures are favored, with p‐alkoxy chains behaving also as a plasticizer of the main chain. The clearing point can be influenced by copolymerization of monomers with different hard cores. The three‐component thermodynamic model of side‐chain mesomorphic polymers well explains the effect of different structural elements on the structure and properties of these polymers.

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The Effect of the Structural Elements on the Properties of Side Chain Mesomorphic Polymers

Cser¹,

Horvath²,

Nyitrai³

et al. 1985

Israel Journal of Chemistry

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Zur kinetik der copolymerisation von methacrylaten mit entkoppelter seitengruppe

Rübner¹,

Geßner²,

Rodekirch³

et al. 1994

Macro Chemistry & Physics

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The copolymerization behaviour of methacrylate monomers with several decoupled side groups was studied depending on the structure of the linked mesogen. Some units (-N=N--, -CO-NH-)in the rnesogen influence the copolymerization reaction in spite of the strong decoupling by a C6-spacer group and lead to retarding effects and to the preferred insertion of monomers with weaker mesogenic interactions. The liquid-crystalline behaviour of the copolymers was not affected due to the relatively small differences in the copolymerization parameters.

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Study on the copolymerization of phenyl ester-type monomrs comprising mesogenic groups in the side chain

Horvath

Cser

Hardy

Frontiers in Polymer Science

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Four copolymer systems from six acrylic monomers were prepared. The relative reactivity ratios in the copolymers were as follows:for p-butoxyphenyl p'-acryloyloxybenzoate (BPAB) with p-phenyl p'-acryloyloxy ethoxybenzoate (PAEB), rBV^B = 0.39 and rVAEB = 0.65;--for BPAB with p-butoxyphenyl p'-acryloyloxy ethoxybenzoate (BPAEB), rBVAB = 0.94 and rBp^E B = 0.45; --for p-phenyl p'-acryloyloxybenzoate (PAB) with p-octyloxyphenyl p'-methacryloyloxy ethoxybenzoate (OPMEB), rpAB = 0.29 and rOPME B =-1.24;--for PAB with I~-methoxyphenyl p'-acryloyloxy ethoxybenzoate (MPAEB), rpA B = 1.15 and rMPAE B ----0.62.All of the copolymers are mesomorphic systems. Plots of their transition temperatures against the copolymer composition have a minimum for PAB/OPMEB and PAB/ MPAEB systems and a break-point for BPAB/PAEB and BPAB/BPAEB systems.

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Polymerization in liquid crystals. XIII. Copolymerization of mesogenic monomers

Cited by 6 publications

References 17 publications

The Effect of the Structural Elements on the Properties of Side Chain Mesomorphic Polymers

The Effect of the Structural Elements on the Properties of Side Chain Mesomorphic Polymers

Zur kinetik der copolymerisation von methacrylaten mit entkoppelter seitengruppe

Study on the copolymerization of phenyl ester-type monomrs comprising mesogenic groups in the side chain

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