The use of differential photocalorimetry to measure the oxidation induction time of isotatic polypropylene

Volponi, José Eduardo; Mei, Lucía Helena Innocentini; Rosa, Derval dos Santos

doi:10.1016/j.polymertesting.2003.09.004

Cited by 9 publications

(3 citation statements)

References 2 publications

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“…The OIT value of the NWF_ PP sample treated with green tea extract was 67 min. The analyses carried out in dynamic mode (OOT) confirmed the general trend: the untreated face mask support showed an onset at about 200°C, while a consistent shift towards higher temperature of about 40°C was observed for the fabric treated with green tea extract in agreement with the OIT measurements and with the literature related to stabilized PP samples, [49] also with polyphenolic extracts. [50] Interestingly, OOT measurements did not evidence oxidative degradation in NWF_PP samples treated with cloves and olive leaves extracts up to over 300°C.…”

Section: Hplc Ft-ir and Thermogravimetric Analysis Of The Raw Extractssupporting

confidence: 84%

Agri‐Food Extracts Effectiveness in Improving Antibacterial and Antiviral Properties of Face Masks: A Proof‐of‐Concept Study

et al. 2021

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The European dependencies for raw materials supply from foreign countries have been unquestionably shown by COVID‐19 outbreak and have become particular evident from the slow response to the need for high quality personal protective equipment (PPEs). Among all medical devices, surgical face masks have earned themselves a primary role for the containment of the epidemic. In this context, our work aims at improving the barrier effect of surgical mask by depositing on their external surface a mixture of bioactive compounds, mainly polyphenols, extracted from agronomical sources. The main objective is the integration of the biorefining of agri‐food solid wastes with the potential virucidal properties of the polyphenolic extracts for the treatment of PPEs.

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Section: Hplc Ft-ir and Thermogravimetric Analysis Of The Raw Extractssupporting

confidence: 84%

Agri‐Food Extracts Effectiveness in Improving Antibacterial and Antiviral Properties of Face Masks: A Proof‐of‐Concept Study

et al. 2021

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“…For the combination of phenolic antioxidants with HALS there are antagonisms as well as synergisms reported [89][90][91][92][93][94][95]. Many polymers contain a phenolic antioxidant and/or a phosphite as processing stabilizer.…”

Section: Interactions Between Hals and Processing Stabilizersmentioning

confidence: 99%

Photostabilisation of Polymer Materials

Gijsman

2010

Photochemistry and Photophysics of Polymer Materials

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“…Both OIT and T d measurements are reported as reliable methods to investigate the stabiliser effectiveness of polymers. [7][8][9] Also rheological properties as well as mechanical properties can be used to assess the stability of the material. 10,11 A number of research papers investigate process stability of recycled and pristine PP, see for example, Refs.…”

Section: Introductionmentioning

confidence: 99%

Recycled polypropylene aimed as composites precursor material

Szpieg

Wysocki²,

Asp

2009

Plastics, Rubber and Composites

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The aim of this research is to assess the stability and processability of recycled polypropylene (PP) materials for their suitability for use as matrix material in polymer composite. The work comprises development and characterisation of matrix precursors from recycled PP. The reused PP considered comes from two sources: PP from the self-reinforced PP Pure processing scrap and an automotive grade developed to offer an even material quality. To assess the thermal stability of two PP qualities for subsequent composite manufacturing, oxidation induction time (OIT), melting point T m , decomposition temperature T d and viscosity m were investigated. The results indicate, that Pure processing scrap is very well stabilised and therefore suitable for multiple processing, whereas the automotive grade recycled PP cannot be used for this purpose. Fibres for subsequent composite preforming were spun by melt spinning from the Pure scrap processing and its mechanical properties were characterised.

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The use of differential photocalorimetry to measure the oxidation induction time of isotatic polypropylene

Cited by 9 publications

References 2 publications

Agri‐Food Extracts Effectiveness in Improving Antibacterial and Antiviral Properties of Face Masks: A Proof‐of‐Concept Study

Agri‐Food Extracts Effectiveness in Improving Antibacterial and Antiviral Properties of Face Masks: A Proof‐of‐Concept Study

Photostabilisation of Polymer Materials

Recycled polypropylene aimed as composites precursor material

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