## Abstract **Summary:** Matching macrocyclic and linear polystyrenes (PS) were synthesized by the initiation of styrene with 2,7βdimethylβ3,6βdiphenyloctane dianion lithium salt followed by high dilution coupling with 1,4βbis(bromomethyl)benzene or protonation. Liquid chromatography at the critica
Stereochemistry of vinyl polymers and NMR characterization
β Scribed by H. N. Cheng
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 578 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
β¦ Synopsis
The configuration of vinyl polymers has been conventionally described by either Bovey's or Price's formalism. In this work, the relationships between these two formalisms are derived, and their relevance to polymerization mechanisms is delineated. Experimental data for nuclear magnetic resonance (NMR) pertaining to either chain-end control or catalytic-site control are tested using the computerized "analytical approach." Suitable polymeric systems are illustrated.
π SIMILAR VOLUMES
A series of functionalized vinyl cinnamate monomers were synthesized by the reaction of hydroxyethylmethacrylate and various substituted cinnamoyl chlorides. Electron donating and accepting functional groups such as wOCH 3 , wCl and were introduced at the para position of cinnamoyl chloride. wNO 2 H
## Abstract **Summary:** The tacticity spreading of chemical shifts in the proton NMR spectrum of poly(propylene) in solution has been analyzed first qualitatively, taking advantage of known trends in both proton chemical shift and conformational statistics of vinyl polymers as summarized in the te
A solution of M3-MP (3.7 g, 3.1 Ο« 10 Οͺ2 mol), TEA (3.4 g, 3.4 Ο« 10 Οͺ2 mol), and N,N-dimethylaminopyridine (DMAP, 0.1 g) in benzene (50 mL) was added dropwise