Search results for "Polyamide 11"

showing 3 items of 3 documents

Time-resolved rheology as a tool to monitor the progress of polymer degradation in the melt state - Part I: Thermal and thermo-oxidative degradation …

2015

Abstract Thermal and thermo-oxidative degradation of polyamide 11 (PA11) in the melt state (T = 215 °C) are studied by resorting to time-resolved mechanical spectroscopy. Such an approach allows to elude the changes in the rheological properties occurring while testing, thus enabling the rigorous study of polymer degradation in the melt state. Different concurrent degradation reactions in oxidative (air) and non-oxidative (N2) environment are promptly guessed by studying the time evolutions of rheological functions. In particular, changes in the zero-frequency complex viscosity reflects changes in the average molecular weight, while the appearance of a yield stress in the complex viscosity …

chemistry.chemical_classificationMaterials sciencePolymers and PlasticsRheometryOrganic ChemistrySize-exclusion chromatographyPolymerSECSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiPolymer degradationChemical engineeringRheologychemistryMALDI- TOF-MSPolyamideThermal degradationThermo-oxidative degradationMaterials ChemistryOrganic chemistryDegradation (geology)Molar mass distributionRheologyPolyamide 11
researchProduct

Time-resolved rheology as a tool to monitor the progress of polymer degradation in the melt state – Part II: Thermal and thermo-oxidative degradation…

2015

Abstract Thermal and thermo-oxidative degradation of nanocomposites based on polyamide 11 (PA11) and organo-modified clay (Cloisite® 30B) are studied in the melt state (T = 215 °C) via time-resolved mechanical spectroscopy (TRMS). The goal is assessing the potentiality of rheological analysis for studying polymer degradation in complex systems such as polymer nanocomposites, whose rheological response stems from the combination of the contributions of polymer and nanoparticles. We prove that a thorough analysis grounded on TRMS allows to isolate the effect of degradation of the polymer matrix, whose progress can be hence profitably monitored. Essentially the same degradation mechanisms as i…

chemistry.chemical_classificationMALDI-TOFMaterials scienceNanocompositeNanocompositePolymers and PlasticsPolymer nanocompositeOrganic ChemistryPolymerOxidative-induction timeSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiPolymer degradationRheologychemistryPolyamideThermal degradationThermo-oxidative degradationMaterials ChemistryDegradation (geology)Composite materialRheologyPolyamide 11Organo-clay
researchProduct

Role of organo-modifier and metal impurities of commercial nanoclays in the photo-and thermo-oxidation of polyamide 11 nanocomposites

2020

The photo-oxidative degradation processes of bio-based PA11 nanocomposites containing montmorillonite (MMT) and the organo-modified Cloisite&reg

Polymers and PlasticsSize-exclusion chromatographythermo-oxidationMass spectrometryArticleNanocompositeslcsh:QD241-441chemistry.chemical_compoundlcsh:Organic chemistryImpuritypolyamide 11 nanocompositesPhoto-oxidationMontmorillonitechemistry.chemical_classificationNanocompositeNanocompositeMolar massBio polyamideThermooxidationGeneral ChemistryPolymerCloisite® 30BPA11MontmorilloniteSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialichemistryChemical engineeringPolyamide
researchProduct