9,10-Anthraquinone derivatives as photoinitiators of crosslinking or degradation of polyethylene

Zamotaev, P.V.; Mityukhin, O. P.; Luzgarev, S. V.

doi:10.1016/0141-3910(92)90027-3

Cited by 11 publications

(18 citation statements)

References 23 publications

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“…A PET film coated with AQ-PB-AQ (7) was exposed to UVA for 4 h. The AQ-PB-AQ (7) layer was collected by scraping with a spatula and subjected to elemental analysis. Element ratios of the collected materials were analyzed and compared with those of non-irradiated AQ-PB-AQ (7).…”

Section: Elemental Analysismentioning

confidence: 99%

“…Swelling Experiment of High Molecular Weight PB Containing AQ-PB-AQ (7) as an Additive To 10 wt % solutions of a commercially available PB (Sigma-AldrichV R , M w 5 $200 kg/mol, trans-1,4:cis-1,4:1,2 5 55:36:9) in chloroform was added AQ-PB-AQ (7) in designated amounts to make 0, 10, 20, and 30 wt % of AQ-PB-AQ (7) in PB matrix. Each solution was cast in Teflon molds and dried for 12 h. The films were then placed in a vacuum oven and dried for another 1 h at RT.…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

“…Due to this unique photochemical capability, AQ derivatives have been used in the polymerization of various monomers as a photo‐initiator or in photocrosslinking or photodegradation of polymers such as poly(2‐acrylamidoanthraquinone), polyisoprene, and polyethylene …”

Section: Introductionmentioning

confidence: 99%

“…Due to this unique photochemical capability, AQ derivatives have been used in the polymerization of various monomers as a photo-initiator 3 or in photocrosslinking or photodegradation of polymers such as poly(2-acrylamidoanthraquinone), 4 polyisoprene, 5 and polyethylene. 6,7 For example, Zamotaev et al systematically measured the solubility of various AQ derivatives in polyethylene and studied their efficiency as a photoinitiator for the crosslinking of polyethylene. 7 Due to the poor solubility of their AQ derivatives either in most organic solvents or polymer matrices, arising from their strong p-p interaction and high crystallinity, the crosslinking reaction could not be completed even after 50 h of high power ultraviolet (UV) irradiation (1000 W).…”

mentioning

confidence: 99%

“…6,7 For example, Zamotaev et al systematically measured the solubility of various AQ derivatives in polyethylene and studied their efficiency as a photoinitiator for the crosslinking of polyethylene. 7 Due to the poor solubility of their AQ derivatives either in most organic solvents or polymer matrices, arising from their strong p-p interaction and high crystallinity, the crosslinking reaction could not be completed even after 50 h of high power ultraviolet (UV) irradiation (1000 W).…”

mentioning

confidence: 99%

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Synthesis of telechelic anthraquinone‐functionalized polybutadiene via ROMP and study of its photo‐oxidation and UV crosslinking behaviors

Lee

Moon

2018

J. Polym. Sci. Part A: Polym. Chem.

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Telechelic anthraquinone‐functionalized polybutadiene (AQ‐PB‐AQ) was synthesized by ring opening metathesis polymerization to achieve homogeneous dispersion of AQ groups in the polymer matrix. It was observed that the AQ end groups act as a sensitizing group resulting in photo‐induced crosslinking and oxidation reaction at the olefin groups in the PB. The process was confirmed by comparing the polymer's mass loss and Fourier transform infrared (FTIR) spectra with those of telechelic diacetoxy‐functionalized PB (AcO‐PB‐OAc) which did not show any difference before and after ultraviolet irradiation. Homogeneity of the AQ groups in PB matrix results in rapid crosslinking of PB in a short period of time (<4 min) while a simple blend of AQ methyl ester in AcO‐PB‐OAc matrix did not show such behavior. Photo‐oxidative reaction has concurrently occurred during the crosslinking reaction. Generation of OH, OOH, and carbonyl groups in the matrix during the photo‐oxidation was verified by FTIR, elemental analysis, and water contact angle measurements. A plausible mechanism for the process was proposed in which the photo‐sensitized AQ groups abstract hydrogen from the PB chain to yield reactive radical species, initiating oxidative crosslinking, and degradation of PB or reduction of AQ to hydroanthraquinone species. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1249–1258

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Section: Elemental Analysismentioning

confidence: 99%

Section: Differential Scanning Calorimetrymentioning

confidence: 99%