Results 11 to 20 of about 149,499 (333)
A quantitative relationship between Tgs and chain segment structures of polystyrenes
Polímeros, 2017 The glass transition temperature (Tg) is a fundamental characteristic of an amorphous polymer. A quantitative structure-property relationship (QSPR) based on error back-propagation artificial neural network (ANN) was constructed to predict Tgs of 107 ...
Xinliang Yu, Xianwei Huang
doaj +3 more sources
One-Step Synthesis of Dendritic Highly Branched Polystyrenes by Organotellurium-Mediated Copolymerization of Styrene and a Dienyl Telluride Monomer. [PDF]
Angewandte Chemie, 2019 Dendritic highly branched polystyrenes (HB-PSts) were prepared by a one-step copolymerization of dienyl telluride 6 and St in the presence of organotellurium chain transfer agent 2.
Yang-Tian Lu, S. Yamago
semanticscholar +2 more sources
Highly Anisotropic Glassy Polystyrenes Are Flexible. [PDF]
ACS Macro Letters, 2018 We show that stretching polystyrene melts at a rate faster than the inverse Rouse time, followed by rapid quenching below the glass transition temperature, results in a material that is flexible and remains so for at least six months.
Qian Huang +6 more
semanticscholar +2 more sources
Segmental Dynamics in Multicyclic Polystyrenes
, 2018 The segmental dynamics and the corresponding glass temperature, T, were investigated in a monocyclic and in the corresponding linear polystyrene as well as in a series of multicyclic polystyrenes, all with the same total molecular weight, with dielectric
Achilleas Pipertzis +3 more
semanticscholar +2 more sources
Effects of molecular weight distribution on the self-assembly of end-functionalized polystyrenes
, 2017 The molecular weight distribution of hydroxyl-end-functionalized polystyrenes shows effects on the self-assembly of patterned porous films and the mechanical strength.
Bai-Heng Wu +3 more
semanticscholar +2 more sources
Direct dendronization of polystyrenes using dendritic diarylcarbenium ion pools.
Chemical Communications, 2011 Dendritic diarylcarbenium ions reacted with unfunctionalized polystyrenes to give dendronized polymers, which were characterized by MALDI-TOF MS and AFM.
T. Nokami +6 more
semanticscholar +2 more sources
, 2009 International audienceCrosslinked organic and hybrid multilayer thin films based on polystyrene-grafted platinum nanoparticles and azidomethyl-functionalized polystyrenes are built-up by sequential spin-coating and UV crosslinking processes.
S. Al Akhrass +7 more
semanticscholar +6 more sources
Journal of Physical Chemistry B, 2010 We have synthesized well-defined multiarmed star polystyrenes, with 6, 9, 17, 33, and 57 arms, and studied their molecular shapes and structural characteristics in a good solvent (tetrahydrofuran at 25 degrees C) and in a theta (Theta) solvent ...
Sangwook Jin +8 more
semanticscholar +2 more sources
Multihydroxyl-Functional Polystyrenes in Continuous Flow
Figshare, 2010 We describe the synthesis of end-functionalized polystyrenes by living anionic polymerization in a microstructured reactor via termination by acetal-protected functional epoxides.
Christoph Tonhauser +6 more
semanticscholar +3 more sources
Conformational entropy bottleneck in polymer nanopore interception driven by branching architecture and excluded volume [PDF]
Nature CommunicationsThe transport of polymers through nanopores is fundamentally governed by the interplay between molecular topology and nanoconfinement. However, how branching architecture influences the critical interception size (R h,c) under weak compression—where ...
Yiren Wang +6 more
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