Identification of the interaction of chromophor side-groups in macromolecules and the evaluation of their stability by fluorescence spectroscopy

Amerik, Yu.B.; Bairamov, Yu. Yu.; Krentsel, B. A.

doi:10.1007/bf00614099

Cited by 1 publication

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The recent discovery that energy transfer processes in man-made polymers can mimic similar effects in natural chloroplasts has produced considerable interest in this field. [5][6][7][8] Polymers with intrachain transfer efficiencies comparable to those of green plant photosystems have been reported,9,10 and singlet energy migration is believed to be partially responsible for the high efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…However, little is known about the degradation behavior of aryl methacrylate polymers. 5,6 In this paper, the photodegradation characteristics of 1-naphthyl methacrylate (1NMA) homopolymer and copolymers with BMA in deaerated benzene solutions are reported. The main purpose of this work is to clarify the influence of the copolymer composition on the quantum yiled for main-chain scission occurring in poly(lNMAco-BMA).…”

mentioning

confidence: 99%

“…av 8.71 ± 0.17 av 0.708 ± 0.002 curve corresponding to a specified elution volume V¡.n Hence, from the viscosity and GPC data for the arbitrary set of 1NMA homopolymers listed in TableI, the self-consistent value of a can be computed by11 0 Determined by 'H NMR 6. Determined by GPC.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Photodegradation of 1-naphthyl methacrylate-butyl methacrylate copolymers in benzene solution

Nishimoto¹,

Yamamoto²,

Kagiya³

1982

Macromolecules

View full text Add to dashboard Cite

The photodegradation behavior of the copolymers of 1-naphthyl methacrylate (1NMA) with butyl methacrylate (BMA) in benzene solution has been investigated under deaerated conditions at room temperature. Irradiation in the 285-330-nm wavelength region led to main-chain cleavage in poly(lNMA) and poly(lNMA-co-BMA) accompanied by the evolution of carbon monoxide, whereas no chemical change was observed in the case of poly (BMA). The apparent rate constant for the main-chain scission of poly-(lNMA-co-BMA) in benzene solutions (1 g dm"3) increased with increasing 1NMA content up to 12.5 mol %. At this point the maximum value of 5.96 X 10"6 min'1 was obtained. Further increases in 1NMA content depressed the apparent rate for main-chain scission. The quantum yield for main-chain scission decreased monotonously with the increase in 1NMA content to attain its minimum value of 1.5 X 10"2 scissions per absorbed quantum for poly(lNMA).Homopolymers of alkyl methacrylates such as methyl methacrylate (MMA),1,2 butyl methacrylate (BMA),3 and tert-hutyl methacrylate ( -BMA)4 have been well characterized with respect to thermal and photochemical degradation in solution as well as in the solid state. Considerable attention has also been given to the degradation behavior of various copolymers containing alkyl methacrylate monomer units. The major processes involved in the degradation of alkyl methacrylate polymers have been demonstrated to be decomposition of side-chain ester groups, main-chain carbon-carbon bond scission, and depolymerization. These processes are significantly affected

show abstract

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%