Synthesis and Characterization of Narrow Molecular Weight Distribution AB and ABA Poly(vinylpyridine)−Poly(dimethylsiloxane) Block Copolymers via Anionic Polymerization

2001 ◽  
Vol 34 (9) ◽  
pp. 2805-2811 ◽  
Author(s):  
James Lee ◽  
Thieo E. Hogen-Esch
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Anionic Polymerization ◽  
Synthesis And Characterization ◽  
Narrow Molecular Weight Distribution

scholarly journals Lithographic Characterization of Poly(4-vinylphenyldimethylvinylsilane) Having Narrow Molecular Weight Distribution

1997 ◽  
Vol 29 (4) ◽  
pp. 387-390 ◽  
Author(s):  
Kazunori Se ◽  
Kohzaburoh Matsumura ◽  
Takeo Kazama ◽  
Teruo Fujimoto
Keyword(s):  
Molecular Weight ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Narrow Molecular Weight Distribution

Synthesis and Characterization of Star-Shaped Porphyrin-Cored Poly(L-lactide)

2011 ◽  
Vol 239-242 ◽  
pp. 1703-1706 ◽  
Author(s):  
Xiao Hui Dai ◽  
Wei Liu ◽  
Ya Fei Huang ◽  
Chang Ming Dong
Keyword(s):  
Molecular Weight ◽  
Photodynamic Therapy ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
Porphyrin Core

Star-shaped porphyrin-cored poly(L-lactide) (SPPLLA) was synthesized using a tetra-hydroxyethyl terminated porphyrin as a core initiator and 4-(Dimethylamino)pyridine (DMAP) as a catalyst in THF at 50 °C. The molecular weight of as-synthesized polymer were measured by GPC and1HNMR. It was found that the molecular weight of SPPLLA could be adjusted linearly by controlling the molar ratio of L-lactide to porphyrin core initiator, and the molecular weight distribution was reasonably narrow. Furthermore, SPPLLA polymers showed similar UV-vis spectra compared with porphyrin core initiator. Consequently, this will provide potentially porphyrin-cored poly(L-lactide) for photodynamic therapy.

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