Synthesis of Star Polymer Architectures with Site-Isolated Chromophore Cores

2008 ◽  
Vol 41 (10) ◽  
pp. 3472-3480 ◽  
Author(s):  
Chinessa T. Adkins ◽  
Eva Harth
Keyword(s):  
Star Polymer ◽  
Polymer Architectures

scholarly journals Nanogel Star Polymer Architectures: A Nanoparticle Platform for Modular Programmable Macromolecular Self-Assembly, Intercellular Transport, and Dual-Mode Cargo Delivery

2011 ◽  
Vol 23 (39) ◽  
pp. 4509-4515 ◽  
Author(s):  
Victor Y. Lee ◽  
Karen Havenstrite ◽  
Melia Tjio ◽  
Melanie McNeil ◽  
Helen M. Blau ◽  
...  
Keyword(s):  
Self Assembly ◽  
Star Polymer ◽  
Dual Mode ◽  
Intercellular Transport ◽  
Cargo Delivery ◽  
Polymer Architectures

scholarly journals Lymphatic trafficking kinetics and near-infrared imaging using star polymer architectures with controlled anionic character

2012 ◽  
Vol 47 (1) ◽  
pp. 287-294 ◽  
Author(s):  
Taryn R. Bagby ◽  
Shaofeng Duan ◽  
Shuang Cai ◽  
Qiuhong Yang ◽  
Sharadvi Thati ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Imaging ◽  
Star Polymer ◽  
Near Infrared Imaging ◽  
Polymer Architectures

scholarly journals PEG-POSS Star Molecules Blended in Polyurethane with Flexible Hard Segments: Morphology and Dynamics

Molecules ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 99
Author(s):  
Konstantinos N. Raftopoulos ◽  
Edyta Hebda ◽  
Anna Grzybowska ◽  
Panagiotis A. Klonos ◽  
Apostolos Kyritsis ◽  
...  
Keyword(s):  
Glass Transition ◽  
Star Polymer ◽  
Polymerization Process ◽  
Degree Of Crystallinity ◽  
Dielectric Relaxation Spectroscopy ◽  
Scanning Calorimetry ◽  
Similar System ◽  
Soft Phase ◽  
Hard Segments ◽  
Star Molecules

A star polymer with a polyhedral oligomeric silsesquioxanne (POSS) core and poly(ethylene glycol) (PEG) vertex groups is incorporated in a polyurethane with flexible hard segments in-situ during the polymerization process. The blends are studied in terms of morphology, molecular dynamics, and charge mobility. The methods utilized for this purpose are scanning electron and atomic force microscopies (SEM, AFM), X-ray diffraction (XRD), differential scanning calorimetry (DSC), and to a larger extent dielectric relaxation spectroscopy (DRS). It is found that POSS reduces the degree of crystallinity of the hard segments. Contrary to what was observed in a similar system with POSS pendent along the main chain, soft phase calorimetric glass transition temperature drops as a result of plasticization, and homogenization of the soft phase by the star molecules. The dynamic glass transition though, remains practically unaffected, and a hypothesis is formed to resolve the discrepancy, based on the assumption of different thermal and dielectric responses of slow and fast modes of the system. A relaxation α′, slower than the bulky segmental α and common in polyurethanes, appears here too. A detailed analysis of dielectric spectra provides some evidence that this relaxation has cooperative character. An additional relaxation g, which is not commonly observed, accompanies the Maxwell Wagner Sillars interfacial polarization process, and has dynamics similar to it. POSS is found to introduce conductivity and possibly alter its mechanism. The study points out that different architectures of incorporation of POSS in polyurethane affect its physical properties by different mechanisms.

Bio-mimicking hybrid polymer architectures as adhesion promoters for low and high surface energy substrates

2021 ◽  
Author(s):  
Monisha Baby ◽  
Vijayalakshmi K. Periya ◽  
Bhuvaneshwari Soundiraraju ◽  
Nisha Balachandran ◽  
Suchithra Cheriyan ◽  
...  
Keyword(s):  
Surface Energy ◽  
High Surface ◽  
Hybrid Polymer ◽  
Energy Substrates ◽  
Adhesion Promoters ◽  
Polymer Architectures ◽  
High Surface Energy

Skin-Inspired Hierarchical Polymer Architectures with Gradient Stiffness for Spacer-Free, Ultrathin, and Highly Sensitive Triboelectric Sensors

ACS Nano ◽  
2018 ◽  
Vol 12 (4) ◽  
pp. 3964-3974 ◽  
Author(s):  
Minjeong Ha ◽  
Seongdong Lim ◽  
Soowon Cho ◽  
Youngoh Lee ◽  
Sangyun Na ◽  
...  
Keyword(s):  
Highly Sensitive ◽  
Polymer Architectures
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