نتایج جستجو برای: polystyrenes

تعداد نتایج: 5181  

2014
Toshiki Nokami Naoki Musya Tatsuya Morofuji Keiji Takeda Masahiro Takumi Akihiro Shimizu Jun-ichi Yoshida

Dendronized polystyrene having peripheral bromo groups was prepared from the dendronization of unfunctionalized polystyrene with dendritic diarylcarbenium ions bearing peripheral bromo groups using the "cation pool" method. The palladium-catalyzed amination of the peripheral bromo groups with diarylamine gave dendronized polystyrene equipped with peripheral triarylamines, which exhibited two se...

Journal: :Chemical communications 2009
Chengzhong Cui Frieder Jäkle

The facile preparation of organoboronium polymers via spontaneous reaction of bromoborylated polystyrene with 2,2'-bipyridine is reported; these novel polycations represent an interesting alternative to commonly used ammonium-based polycations.

2017
Author Terao Ken Terao Jimmy W. Mays

On-line two-angle (15 and 90) light scattering measurements with a gel permeation chromatograph for linear and branched polystyrene in tetrahydrofuran (a good solvent) and in trans-decalin (a theta solvent) were made and compared with data from a multi-angle light scattering detector and literature values. Theoretically, weight-average molecular weight and the radius of gyration Rg can be det...

1991
Peter H. Verdier

A light scattering detector has been designed and constructed for use with gel permeation chromatographs. The detector measures light scattered from the eluting sample simultaneously at nine scattering angles, and is connected to a computer-controlled display which exhibits the angular dependence of the scattering in real time while the sample is eluting. Use of the light-scattering detector in...

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