Study on glass transition and physical aging of polystyrene nanowires by differential scanning calorimetry
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Polymer Research"
DOI: 10.1007/s10965-017-1199-2
Abstract: In the present study, polystyrene (PS) nanowires in aqueous dispersion with a diameter ranging from 120 to 300 nm are prepared via electrospun and dispersed in water. Relatively, PS nanowires confined in anodic aluminum oxide (AAO)… read more here.
Keywords: aao template; transition physical; glass transition; polystyrene nanowires ... See more keywords
A nonlinear viscoelastic constitutive model taking into account of physical aging
Sign Up to like & getrecommendations! Published in 2020 at "Mechanics of Time-dependent Materials"
DOI: 10.1007/s11043-020-09473-x
Abstract: Polymers exhibit viscoelastic behavior: their mechanical response depends on the loading time, or on the loading frequency. In addition, if a polymer structure has a long service life, the mechanical behavior can also depend on… read more here.
Keywords: viscoelastic constitutive; taking account; nonlinear viscoelastic; time ... See more keywords
Effect of Physical Aging on the Bending Recovery of PEEK and PI Films
Sign Up to like & getrecommendations! Published in 2019 at "Fibers and Polymers"
DOI: 10.1007/s12221-019-8850-y
Abstract: The relationship between the viscoelasticity and bending recovery responses of PI and PEEK films were studied as well as the effect of physical aging treatment on these properties. The residual elastic modulus (Er) and degree… read more here.
Keywords: recovery; peek films; relaxation; effect ... See more keywords
Physical aging effects on the dynamic relaxation behavior and mechanical properties of Cu46Zr46Al8 metallic glass
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Alloys and Compounds"
DOI: 10.1016/j.jallcom.2017.07.291
Abstract: Mechanical relaxation of glassy materials is strongly influenced by their mechanical and physical properties. In the current study, dynamic mechanical relaxation of Cu46Zr46Al8 metallic glass has been investigated by mechanical spectroscopy and molecular dynamics simulations.… read more here.
Keywords: metallic glass; relaxation; glass; mechanical properties ... See more keywords
Physical aging of selenium glass: Assessing the double mechanism of equilibration and the crystallization process
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Non-crystalline Solids"
DOI: 10.1016/j.jnoncrysol.2021.121013
Abstract: Abstract This work focuses on the study of the physical aging of a selenium glass by differential scanning calorimetry (DSC) and fast scanning calorimetry (FSC). Aged samples of 30 and 40 years old at room… read more here.
Keywords: aging selenium; physical aging; temperature; glass ... See more keywords
Physical aging of ester-cross-linked hollow fiber membranes for natural gas separations and mitigation thereof
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Membrane Science"
DOI: 10.1016/j.memsci.2018.01.049
Abstract: Abstract Like other glassy polymers, ester-cross-linked polyimide hollow fiber membranes can experience physical aging, which leads to some loss of permeation productivity. Highly quenched asymmetric structures are especially susceptible to such aging. To explore approaches… read more here.
Keywords: co2; hollow fiber; cross linked; physical aging ... See more keywords
Effects of sub-Tg cross-linking of triptycene-based polyimides on gas permeation, plasticization resistance and physical aging properties
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Membrane Science"
DOI: 10.1016/j.memsci.2018.05.018
Abstract: Abstract Two triptycene-based diamines, 2,6-diaminotriptycene and 2,6-diaminotriptycene- 14-carboxylic acid, were synthesized and reacted with 4,4′-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) to form three polyimides, denoted as 6FDA-DAT, 6FDA-DAT/DATCA (9:1) and 6FDA-DAT/DATCA (8:2). The last two carboxylic acid… read more here.
Keywords: physical aging; gas; dat datca; 6fda dat ... See more keywords
Impeded physical aging in PIM-1 membranes containing graphene-like fillers
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Membrane Science"
DOI: 10.1016/j.memsci.2018.06.026
Abstract: Abstract Physical aging of polymer of intrinsic microporosity PIM-1 is one of the major obstacles for its application as a commercial membrane material for gas separation. In this work, physical aging of PIM-1 and matrices… read more here.
Keywords: aging pim; graphene; pim membranes; graphene like ... See more keywords
3D covalent organic framework for morphologically induced high-performance membranes with strong resistance toward physical aging
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Membrane Science"
DOI: 10.1016/j.memsci.2018.12.078
Abstract: Abstract The physicochemical properties of filler materials are critical considerations influencing the separation performances of mixed-matrix membranes (MMMs). Herein, a three-dimensional covalent organic framework (3D-COF) with a secondary amine-containing backbone was designed to offer large… read more here.
Keywords: organic framework; performance; covalent organic; physical aging ... See more keywords
Physical aging of shape memory polymers based upon epoxy-thiol “click” systems
Sign Up to like & getrecommendations! Published in 2018 at "Polymer Testing"
DOI: 10.1016/j.polymertesting.2017.12.024
Abstract: Abstract The physical aging behaviour of two epoxy-thiol shape memory polymers has been studied: diglycidyl ether of bisphenol-A cross-linked with pentaerythritol tetrakis, denoted 4-thiol, with a calorimetric glass transition temperature, Tg, of 51 °C; and the… read more here.
Keywords: thiol; shape memory; temperature; physical aging ... See more keywords
Control of Physical Aging in Super-Glassy Polymer Mixed Matrix Membranes.
Sign Up to like & getrecommendations! Published in 2020 at "Accounts of chemical research"
DOI: 10.1021/acs.accounts.0c00256
Abstract: ConspectusSince the discovery of polymers of intrinsic microporosity (PIMs) in 2004, the fast size-selective interconnected pore cavities of the polymers have caused the upper bound of membrane performance to be revised, twice. Simultaneously, porous materials… read more here.
Keywords: glassy polymer; polymer; mixed matrix; matrix membranes ... See more keywords