Newly prepared high-cis poly(2,4-difluorophenylacetylene) is found to undergo simultaneous cis-to-trans isomerization and degradation during aging in THF-d 8 solution exposed to the atmosphere. Partly aged polymers contain two microstructurally differing fractions: deeply isomerized macromolecules o
Molecular weight and configurational stability of poly(phenylacetylene) prepared with Rh catalyst
✍ Scribed by Olga Trhlíková; Jiří Zedník; Jiří Vohlídal; Jan Sedláček
- Book ID
- 108247609
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 349 KB
- Volume
- 96
- Category
- Article
- ISSN
- 0141-3910
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract **Summary:** Magnetic field dependence of poly(phenylacetylene) (PPA) that has been stereoregularly prepared with a Rh complex catalyst was investigated in detail between 2 K and 300 K. The data showed a spin glass‐like magnetic behavior, i.e., two cusps were clearly observed when PPA w
Phenylacetylene was polymerized with WOCl,/tetraphenyltin (mole ratio 1 : 2) catalyst in benzene and benzene/ 1 ,4-dioxane mixtures. The resulting polymers were characterized by means of multidetector size-exclusion chromatography and ' H NMR and IR spectroscopy. 1,4-Dioxane used as a co-solvent was
## Abstract **Summary:** pXPAs were stereospecifically polymerized using [Rh(nbd)Cl]~2~ as catalyst in the presence of a mixed solvent, i.e., ethanol and triethylamine, at 20 °C. The resulting PpXPAs were characterized in detail in order to predict geometrical structures concerning __cis__ and __tr
Tokuyama Soda Co., Ltd., Yarnaguchi, 745 Japan ## SYNOPSIS Poly( vinyl chloride) with relatively low molecular weight (LMW-PVC) was prepared by suspension polymerization in the presence of some chain-transfer agents, such as mercapto compounds. It is elucidated by means of thermogravimetry, dehyd