6533b873fe1ef96bd12d4efe
RESEARCH PRODUCT
Mechanical properties of the nanometer scale pre-crystalline order of a poly (ethylene terepthalate) / poly (ethylene naphthalene) blend
Stefano PiccaroloZebene KiflieDavide Tranchidasubject
Materials scienceNanostructurePolymers and PlasticsnanoindentationOrganic ChemistryNanoindentationIndentation hardnesscrystalline clusterpolyester blendAmorphous solidPolyesterSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiMaterials ChemistryNanometreatomic force microscopy (AFM)Polymer blendComposite materialElastic modulusdescription
A previous study carried out on PET has shown that this polymer undergoes a continuous structural modification over a wide cooling rate interval when solidified from the melt[1] assuming a semi-crystalline structure below 2 K s 1 and a completely amorphous one above 100 K s 1. Most important was the existence of a state of intermediate order between the above cooling rates which was evidenced by the absence of crystalline reflections in the WAXS patterns and the occurrence of SAXS maxima[2] and exothermic peak areas (DSC) in the cooling rate range above 2 K s 1. Microhardness (MH) measurements revealed that this phase affects the mechanical properties[3] plausible if one thinks of crystalline clusters of intermediate order, dispersed in the amorphous polymer
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-09-22 |