Search results for "Repeating unit"

showing 1 items of 1 documents

Assessing the MALDI-TOF MS sample preparation procedure to analyze the influence of thermo-oxidative ageing and thermo-mechanical degradation on poly…

2011

[EN] Multiple processing by means of successive injection cycles was used to simulate the thermo-mechanical degradation effects on the oligomeric distribution of PLA under mechanical recycling. Likewise, an accelerated thermal ageing over PLA glass transition was performed in order to simulate its service life. MALDI-TOF MS was used for the analysis and the sample preparation procedure was assessed by means of a statistical Design of Experiments (DoE). The quality effects in use for the analysis were signal-to-noise ratio and Resolution. Different matrixes, analyte/matrix proportions and the use of NaTFA as cationization agent were considered. A deep inspection of the statistical results pr…

Solucions polimèriquesPolymers and PlasticsGeneral Physics and AstronomyTransesterificationsThermo-mechanical degradationSample preparation procedureMatrix (chemical analysis)DegradationMechanismsMaterials ChemistryCationizationMechanical recyclingSample preparationRepeating unitPoly(lactide)Signal to noise ratioChemistryMultiple processingDesign of Experiments (DoE)AnalytesInjection cyclesPolylactidesMAQUINAS Y MOTORES TERMICOSMatrix-assisted laser desorption/ionization-time-of-flight mass spectrometryGlass transitionDesign of experimentsGlass lasersThermo mechanicalMALDI TOF MSChromatographyMatrixMass spectrometrySignal to noiseTermoplàsticsOrganic ChemistryDegradation mechanismThermo-oxidative ageingStatistical design of experimentsMatrix-assisted laser desorption/ionizationInvestigation methodsMatrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS)Polylactide (PLA)AgeingOligomersDegradation (geology)DesorptionDeep inspectionExperimentsPoly(lactide)European Polymer Journal
researchProduct