Slouf, Miroslav published the artcileProoxidant activity of phenolic stabilizers in polyolefins during accelerated photooxidation, Recommanded Product: Bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate, the main research area is prooxidant phenolic stabilizer polyolefin accelerated photooxidation.
Polymer plaques made of high d. polyethylene (HDPE) and of two types of cycloolefin copolymer (COC) differing in glass transition temperature, were stabilized with 0.2 or 1.0 weight % of natural (α-tocopherol) or synthetic (Irganox 1010) phenolic stabilizer or hindered amine stabilizer (Tinuvin 770) and aged using accelerated weathering technique (WOM). The efficiency of the phenolic stabilizers was compared among themselves and with well-established Tinuvin770. Concentration profiles of radicals generated inside polymer plaques during WOM exposure were determined by ESRI, profiles of oxidation products and crystallinity inside the HDPE plaques were determined by IR microspectroscopy, oxidation products in COC copolymers were identified using ATR, the changes of local mech. properties of the polymer plaques were characterized using microindentation hardness testing, and their morphol. was studied by light and/or SEM. All the techniques evidenced high stability of neat COC against photooxidation processes, whereas neat HDPE exhibited fast photooxidation of the surface layers. Tinuvin770 was found to provide long term protection to both HDPE and COC against photodegradation In contrast, the same polymers stabilized with the natural phenolic antioxidant α-tocopherol (the most active component of vitamin E) or synthetic phenolic antioxidant Irganox1010 exhibited an increase in the surface oxidation in comparison with the neat polymers during WOM exposure, proving prooxidant activity of phenolic stabilizers during WOM exposure in all polymers studied. The prooxidant activity α-tocopherol was stronger in comparison with Irganox1010. We conclude that neither of the two phenolic stabilizers was able to provide long term protection of the investigated polymers against photooxidation
Polymer Degradation and Stability published new progress about Aging of materials, accelerated. 52829-07-9 belongs to class piperidines, name is Bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate, and the molecular formula is C28H52N2O4, Recommanded Product: Bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate.
Referemce:
Piperidine – Wikipedia,
Piperidine | C5H11N – PubChem