PAROLE IN INGLESE ASSOCIATE CON «HETEROTACTIC»
heterotactic
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10 LIBRI IN INGLESE ASSOCIATI CON «HETEROTACTIC»
Scopri l'uso di
heterotactic nella seguente selezione bibliografica. Libri associati con
heterotactic e piccoli estratti per contestualizzare il loro uso nella letteratura.
1
Synthetic Biodegradable Polymers
28) [66] produced heterotactic-enriched PLA by a chain-end control mechanism.
In this process, changing an isopropyl substituent to ethyl resulted in a significant
decrease in heteroselectivity from Pr 1⁄4 0.90–0.79 [66]. Chisholm and ...
Bernhard Rieger, Andreas Künkel, Geoffrey W. Coates, 2012
2
Introduction to Polymer Science and Chemistry: A ...
Thus, an isotactic triad is mm, a heterotactic triad is mr, and a syndiotactic triad rr.
Several such configurational sequences are illustrated in Table 2.1. Each of
these, and even more complicated combinations, can be designated through
NMR ...
3
Handbook of Ring-Opening Polymerization
Site control Chain-end control (metal catalyst) (metal and organic catalyst) rac-
Lactide Isotactic Isotactic or heterotactic meso- Lactide Syndiotactica Syndiotactic
or heterotactic a Assuming that no exchange reactions occur at the metal. tures ...
Philippe Dubois (Prof.), Olivier Coulembier, Jean-Marie Raquez, 2009
4
Stereoselective Polymerization with Single-Site Catalysts
It has been reported that Tg values increase almost linearly with increasing r diad
content.8 Accordingly, highly heterotactic PMMA(96% rm content) displays an
intermediate Tg value of 91 ◦C. All three stereor- egular PMMA isomers exhibit ...
Lisa S. Baugh, Jo Ann M. Canich, 2007
5
Macroporous Polymers: Production Properties and ...
O OR R n O O O H H H O O O O O O O O O S S S S S S R R O n + S S OR 0.5
O O D,L-LA (rac-lactide) 0.5 Atactic PLA Stereoblock isotactic PLA
O O O O O O O O O O n O Heterotactic PLA n O R R R O O O R n OR OR Figure
16.5 Possible ...
Bo Mattiasson, Ashok Kumar, Igor Yu. Galeaev, 2009
6
Advances in Organometallic Chemistry
H O X O O O O O O O OOOO O OO On {LONR}Ln(N(SiMe3)2) toluene or THF C n
20 (S,S)-lactide (R,R)-lactide heterotactic-enriched PLA Mono(guanidinate) rare-
earth metal bis(amide) complexes (cf. Scheme 2.303) have been reported to ...
Anthony F. Hill, Mark J. Fink, 2013
7
Macromolecular Design of Polymeric Materials
Hatada. Table 3 Polymerization of MMA with [(C5Me5)2SmH]2 Source: Ref. 27.
Very recently, a combination of r-C4H9Li and bis(2,6-di-?m-butylphenoxy)
methylaluminum [MeAl(ODBP)2] was found to be a heterotactic-specific initiator
for the ...
8
Annual Review of NMR Spectroscopy APL
Carbon 7 is said to be in the heterotactic position since carbon 5 has the same
configuration but HHAXHCXHXHHHX I I I I I I I I I I I —C—C—C—C—C—C—C—
C—C—C—C— I I I I I I I I I I I x HBH HDH H H H x H H 1234567891011 FIG. 1.
9
Molecular Characterization and Analysis of Polymers
Since there are twice as many possible arrangements of heterotactic, a random
mixture of triads would result in 25% isotactic, 25% syndiotactic, and 50%
heterotactic triads. This could be an alternative definition of an atactic polymer. It
should ...
John M. Chalmers, Robert J. Meier, 2008
10
Chemical Reactions: Quantitative Level of Liquid and Solid Phase
With regard to the heterotactic triad content, a unique linear decrease is observed
, regardless of the type of interacting agent. Note that the corresponding slope
deviates slightly from unity. The results of Fig. 5 agree thoroughly with those ...
Gennadiĭ Efremovich Zaikov, Alfonso Jiménez, 2004
