Aryl (meth)acrylates and polymers based on them

Abstract

We extend our previous formulation of low-energy QCD in terms of an effective lagrangean containing operators of dimensionality d ≤ 6 constructed with pseudoscalars and quark fields, describing physics below the scale of chiral symmetry breaking. We include in this paper the vector and axial-vector channels. We follow closely the Extended Chiral Quark Model approach and consistently work in the large-N c and leading log approximation and take into account the constraints from chiral symmetry and chiral symmetry restoration. The optimal fit of all parameters gives further support to a heavy scalar meson with a mass ∼ 1 GeV and a value of the axial pion-quark coupling constant g A 0.55 to 0.66, depending on some assumptions concerning the Weinberg sum rules.

A facile synthesis route for carboxyaryl-methacrylates: a way to obtain aromatic polyelectrolytes

“…The yields obtained tended to depend on the position of substitution in the aromatic ring of the spacer: para > meta > ortho. As pointed out in a recent review on arylmethacrylates [19], the free-radical polymerization of ortho-substituted phenylmethacrylates proceeds more slowly than that of the para isomers. This can be explained in terms of the partial shielding of the growing polymer chain in the case of ortho substitution.…”

Property modification of poly(methyl methacrylate) through copolymerization with fluorinated aryl methacrylate monomers

“…3,4 Poly(aryl methacrylate)s have relatively higher T g , due to the enhanced rigidity of the aromatic ring-containing polymeric chains. 5 Aryl methacrylates are easily copolymerized with most of the known monomers, which allows broad modifications for polymer properties. In order to increase T g of PMMA, investigators have explored its copolymerization with rigid or bulky aryl methacrylate monomers.…”

Synthesis of poly[1,1,1,3,3,3-hexafluoro-2-(pentafluorophenyl)propan-2-yl methacrylate]: Thermal and optical properties of the copolymers with methyl methacrylate

“…Although these fluorine-substituted phenyl methacrylates yield excellent random copolymers with various compositions of MMA, the T g -values of the copolymers produced were in the range of 90-120 8C [6]. Generally, the T g -values of alkyl and aryl methacrylates are higher than those of acrylates [7][8][9][10]. The T g of poly(1,1,1,3,3,3-hexafluoro-2-(pentafluorophenyl)propan-2-yl acrylate was reported as 118 8C [11].…”