Secondary and tertiary piperidinyl compounds as stabilizers for γ-irradiated polypropylene

Falicki, S.; Gosciniak, D. J.; Cooke, J. M.; Carlsson, D. J.

doi:10.1016/0141-3910(94)90220-8

Cited by 6 publications

(2 citation statements)

References 17 publications

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“…Hindered amine light stabilizers (HALSs) are the most effective existing light stabilizers protecting polyolefins and other polymers from light‐induced degradation,4–6 and they are also very effective in protecting PP from degradation induced by high‐energy irradiation 7, 8. The stabilizing effectiveness of HALSs is strongly affected by its physical properties, such as its thermal stability in thermal processing, solvent extraction resistance, and compatibility with the polymer to be protected.…”

Section: Introductionmentioning

confidence: 99%

Failure of drug eluting stents presented as definite stent thrombosis

Vaknin‐Assa

Assali

Lev

et al. 2010

Cathet Cardio Intervent

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Section: Introductionmentioning

confidence: 99%

Failure of drug eluting stents presented as definite stent thrombosis

Vaknin‐Assa

Assali

Lev

et al. 2010

Cathet Cardio Intervent

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“…2 They are also very effective in preventing PP from the damage of high-energy irradiation. 3,4 Low molecular weight (LMW) HALS are unstable in the thermal processing of polymers and they have very low solvent extraction resistance, which leads to their very low stabilizing effectiveness. 5 Polymeric HALS are much more stable at high temperature than LMW HALS.…”

Section: Introductionmentioning

confidence: 99%

The effect of grafted TMPM on the radiation resistance of polypropylene

Wang¹,

Chen²

1999

J. Appl. Polym. Sci.

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ABSTRACT:The ␥-radiation-induced graft copolymerization of 2,2,6,6-tetramethyl-4-piperidinyl methacrylate (TMPM) onto polypropylene (PP) was investigated using a simultaneous-irradiation technique. The effects of solvents, atmospheres, dose, and monomer concentration on the percent of grafting were studied. The grafted TMPM showed better thermal stability, solvent extraction resistance, and compatibility with PP than monomeric TMPM or polymeric PTMPM. The stabilizing effectiveness of grafted TMPM on the radiation resistance of PP was found to be better than that of monomeric TMPM. The combination of grafted TMPM and low molecular weight hindered amine light stabilizers showed higher stabilizing effectiveness.

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Radiation‐induced grafting of pentamethyl hindered amine light stabilizer 1,2,2,6,6‐pentamethyl‐4‐piperidinyl methacrylate onto polypropylene

Wang

2005

J of Applied Polymer Sci

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ABSTRACT:The ␥-radiation-induced grafting of 1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate (PMPM) onto polypropylene (PP) was investigated with a simultaneous irradiation technique. The effects of the solvent, dose, monomer concentration, and photoinitiator on the grafting were investigated. The grafting was easier in a benzene solution than in chloroform and acetone solutions. The grafting percentage first increased almost linearly with the irradiation dose until 20 kGy and then increased slowly or remained constant. The grafting percentage increased with the monomer concentration until 1.1 mol/L. The grafting percentage was higher when the proper amount of benzophenone was added. The grafted samples were characterized with Fourier transform infrared spectroscopy and thermogravimetric analysis. Carbonyl groups were found on grafted PP samples, and the carbonyl index increased with the grafting percentage. Thermogravimetric analyses proved the existence of grafted materials on PP, and grafted PMPM thermally decomposed at a lower temperature than PP. The radiation resistance of PP with grafted PMPM was better than that of pristine PP.

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Secondary and tertiary piperidinyl compounds as stabilizers for γ-irradiated polypropylene

Cited by 6 publications

References 17 publications

Failure of drug eluting stents presented as definite stent thrombosis

Failure of drug eluting stents presented as definite stent thrombosis

The effect of grafted TMPM on the radiation resistance of polypropylene

Radiation‐induced grafting of pentamethyl hindered amine light stabilizer 1,2,2,6,6‐pentamethyl‐4‐piperidinyl methacrylate onto polypropylene

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