2,5-poly s,

D-ChiraSpher Poly[(S)-lV-acryloylphenylalanine ethyl ester] [11,23,86] Merck... 

Increasing the molecular weight of polyester (or polyether) or changing its chemical composition could lower the Tg of the TPU and decrease the crystallinity of the polymer. For example, a TPU composed of poly(S-lactone), MDI, and 1,4-butanediol was found to have the lowest degree of crystallinity and, therefore, the best compatibility with PVC when the hard segment in it is 36% by weight [10]. 

Ebdon and coworkers22 "232 have reported telechelic synthesis by a process that involves copolymerizing butadiene or acetylene derivatives to form polymers with internal unsaturation. Ozonolysis of these polymers yields di-end functional polymers. The a,o>dicarboxy1ic acid telechelic was prepared from poly(S-s tot-B) (Scheme 7.19). Precautions were necessary to stop degradation of the PS chains during ozonolysis. 28 The presence of pendant carboxylic acid groups, formed by ozonolysis of 1,2-diene units, was not reported. 

RAFT polymerization has been used to prepare poly(ethylene oxide)-/ /wA-PS from commercially available hydroxy end-functional polyethylene oxide).4 5 449 Other block copolymers that have been prepared using similar strategies include poly(ethylene-co-butylene)-6/oci-poly(S-eo-MAH), jl poly(ethylene oxide)-block-poly(MMA),440 polyethylene oxide)-Moe -poly(N-vinyl formamide),651 poly(ethylene oxide)-Wot A-poly(NlPAM),651 polyfethylene ox de)-b ock-polyfl,1,2,2-tetrahydroperfluorodecyl acrylate),653 poly(lactic acid)-block-poly(MMA)440 and poly( actic acid)-6focA-poly(NIPAM),4 8-<>54... 

Poly(s-Caprolactone) Copolymers with Glycolide or Lactide.228... 

Schmidt MW, Poli S (1998) Experimentally based water budgets for dehydrating slabs and conseqnences for arc magma generation. Earth Planet Sci Lett 163 361-379 Sigmarsson O, Condomines M, Morris JD, Harmon RS (1990) Uraninm and °Be emichments by flnids in Andean arc magmas. Nature 346 163-165... 

Although the biocompatibility and biodegradability of these materials were rapidly determined, the bioactivity of Si02-PCL hybrid materials was not studied until recently [99]. In order to provide bioactivity to Si02-PCL hybrid materials, Rhee prepared triethoxysilane end-capped poly(s-caprolactone) which was then cocondensed with tetraethyl orthosilicate and calcium nitrate via the sol-gel method. The Ca-containing PCL/silica hybrid so obtained showed in vitro bioactivity and biodegradability. The hybridization procedure between the a,co-hydroxyl PCL and silica phases was proposed to be as follows ... 

Saimura M, Takehara M, Mizukami S et al (2008) Biosynthesis of nearly monodispersed poly (s-L-lysine) in Streptomyces species. Biotechnol Lett 30 377-385... 

Decolorization of polymeric dyes Poly R-478 (polyanthraquinone-based) and Poly S-l 19 (azo dye) by immobibzed white rot fungus Crysosporium lignorum CL1 on circular plastic packing material in 2L air-lift fermenter was studied by Buckley and Dobson [47]. They also examined the relationship between polymeric dye decolorization and the production of LiP and MnP activity in its statistically growth... 

The dye Poly R-478 was decolorized to a much greater extent and at slightly faster rate when the culture was supplemented with Mn(II), while the opposite was obtained for Poly S-119. They found a correlation between polymeric dye decolor-ization and peroxidative activity of fungus under static or immobilized condition in air-lift bioreactor. Immobilized culture produced LiP and MnP enzymes over a longer time than static cultures. 

Figure 2.14 Maps of conformational energy as function of backbone torsion angles 9i and 02 of a chain of isotactic poly((S)-3-methyl-l-pentene) for (a,b) left-handed helix and (c) right-handed helix.29 For each pair of Oi and 02, reported energy corresponds to minimum obtained by varying torsion angles of lateral group 03 and 04. Curves are reported at intervals of 0.5 kcal/mol of monomeric unit. Values of energies corresponding to minima are also indicated. (Reprinted with permission from Ref. 29. Copyright 1976 by Elsevier Science.)...

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