Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5200780 | Polymer Degradation and Stability | 2017 | 8 Pages |
Abstract
One of the major issues for poly(propylene) PP concerns its protection towards oxidative phenomena resulting in polymer failure. Using known anti-oxidant (AO), Irganox 1425, an original approach is taking advantage of the counterion, cations Ca2+, in building hydrocalumite inorganic sheets, and concomitantly providing the AO anions to be immobilized within an inorganic host structure. Through the classical co-precipitation method, the hybrid assembly composed of AO molecules interleaved between hydrocalumite layered structure is successfully elaborated in one-step process free of contamination. Hydrocalumite (Ca2Al) belongs to the family of layered double hydroxides (LDH). The structure of the AO-LDH hybrid material is determined by means of XRD, FT-IR, while the radical-scavenging activity of AO-LDH is investigated using DPPH
- (1,1-Diphenyl-2-picryl-hydrazyl) radical concentration variation. A series of AO-LDH/PP composites is then obtained by dispersing AO-LDH into PP at different loading ratios, and addressing the thermal stability, light stability and anti-migration of the resulting composites. The use of hydrocalumite vessel in confining AO molecules helps to increase the thermal stability and resistance against the photo oxidation while providing a barrier effect against organic species migration. An optimized of 4Â wt% AO-LDH into PP results in the best radical-scavenging activity, 1Â wt% is preferred to stabilize PP under light, the former formulation is the best compromise of all the series.
- (1,1-Diphenyl-2-picryl-hydrazyl) radical concentration variation. A series of AO-LDH/PP composites is then obtained by dispersing AO-LDH into PP at different loading ratios, and addressing the thermal stability, light stability and anti-migration of the resulting composites. The use of hydrocalumite vessel in confining AO molecules helps to increase the thermal stability and resistance against the photo oxidation while providing a barrier effect against organic species migration. An optimized of 4Â wt% AO-LDH into PP results in the best radical-scavenging activity, 1Â wt% is preferred to stabilize PP under light, the former formulation is the best compromise of all the series.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Qian Zhang, Qian Jiao, Fabrice Leroux, Pinggui Tang, Dianqing Li, Yongjun Feng,