English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Polymer nanospheres with different size distributions of poly(ethyl methacrylate) are prepared by two different methods, with and without the aid of a surfactant. The calorimetric trace of these spheres shows an increase of the glass transition temperature that has been evaluated by means of an entropy model. This 3D-confinement, imposed by the nanospheres, leads to a limiting number of repeating polymer units in the sphere and thus to a reduction of the possible configuration states of the polymer chains, which is ultimately related to variations in the bulk value of the glass transition temperature. Our model is evaluated against our calorimetric measurements as well as with the data available in the literature. Good agreement between data and model is found for many cases, proving that confinement is related to reductions in entropy for these systems. © 2013 American Chemical Society.Financial support by MAT2008-03232, MAT2011-23455, and MAT2012-33517 from MINECO. JAE-Doc contract, Fondo Social Europeo (FSE) for conancing the JAE Program.Peer Reviewe

Chain Arrangement and Glass Transition Temperature Variations in Polymer Nanoparticles under 3D-Confinement