Fractionation efficiency at narrow molecular weight distributions of macromolecules
β Scribed by H. Craubner
- Publisher
- Springer
- Year
- 1977
- Weight
- 130 KB
- Volume
- 255
- Category
- Article
- ISSN
- 0340-255X
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The preparation of polydimethylsiloxanes (PDMS) of narrow molecular weight distribution (MWD) by anionic polymerization of hexamethyicyclotrisiloxane (D3) in an improved polymerization apparatus is described. Using (CH3)2Si(OLih as initiator and (CH3hSiCI (TMCS) as terminating agent, polymers with o
The preparation of very narrow molecular weight distribution poly(ethylene glycol) (PEG) was investigated by fractional crystallization from solution. Fractionation experiments were conducted from the solutions of 1500, 2000, and 3000 molecular weight PEG in n-butanol/n-heptane mixtures. Size Exclus