Spectrophotometric Analysis of Copolyarylene Phthalides and Their Copolymers with Methyl Methacrylate and Styrene

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Abstract

Sulfuric acid solutions of copolyarylene phthalides of the diphenyloxide series and their copolymers with methyl methacrylate and styrene were studied by the photometric method. According to spectral data, regardless of the ratio of single (α) and double (β + γ) phthalide groups in the macrochains of copolyarylene phthalides in their copolymers with methyl methacrylate, there are ~20–26 mol of MMA per 1 mol of phthalide units. The structure of copolyarylene phthalides is a determining factor in the formation of copolymers with styrene, in which either styrene units or phthalide fragments predominate (~15–40 and ~2–5 mol of styrene per mole of phthalide unit).

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R. Kh. Yumagulova

Ufa Federal Research Center of the Russian Academy of Sciences

Author for correspondence.
Email: jmagulova@anrb.ru
ORCID iD: 0000-0003-3596-1875
Russian Federation, Ufa

T. A. Yangirov

Ufa Federal Research Center of the Russian Academy of Sciences

Email: jmagulova@anrb.ru
ORCID iD: 0000-0002-7267-9716
Russian Federation, Ufa

A. R. Ayupova

Ufa Federal Research Center of the Russian Academy of Sciences

Email: jmagulova@anrb.ru
ORCID iD: 0000-0003-0479-4250
Russian Federation, Ufa

V. A. Kraikin

Ufa Federal Research Center of the Russian Academy of Sciences

Email: jmagulova@anrb.ru
ORCID iD: 0000-0001-8826-8885
Russian Federation, Ufa

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2. Scheme 1

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3. Scheme 2

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4. Fig. 1. Dependence of optical density of sulfuric acid solutions on the concentration of homopolydiphenyloxy diphthalide (a) and PAF9 (b) at 460 and 533 nm (l = 0.501 cm)

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5. Fig. 2. Electronic absorption spectra of sulfuric acid solutions with concentration of (1.51-1.53)-10-2 g/L polyarylenephthalides (a) and second derivative spectra (b)

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6. Fig. 3. Electronic absorption spectra (a) of sulfuric acid solutions with concentration of (1.51-1.53)-10-2 g/L homopolydiphenyloxy diphthalide (1), homopolydiphenyloxy diphthalide PAF-9 (2), their equimolar mixture (3) and second derivative spectra (b)

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7. Fig. 4. Absorption spectra of sulfuric acid solutions (c = 8.32-10-2 g/l) of copolymers of copolyarylenephthalides with methyl methacrylate

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8. Fig. 5. Electronic absorption spectra of arylenephthalidstyrene copolymers of fractions A (a) (c = 13.00-10-2 g/l) and fractions B (b) (3.25-10-2 g/l, for copolymer SP9B c = 1.63-10-2 g/l)

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9. Fig. 6. Dependence of the value of α/(β + γ) on q/p in copolyarylenephthalides, experimental (1) and calculated (1′), in copolymers with methyl methacrylate (2) and with styrene of fractions A (3), fractions B (3′) and homophase systems (3ʺ)

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10. Fig. 7. Composition of copolymers of copolyarylenephthalides with methyl methacrylate (a) and styrene (b) (content of vinyl monomer links per 1 mol of phthalide link)

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