On the instability of polyacenaphthylene in solution

Utracki, L. A.; Eliezer, Naomi; Simha, Robert

doi:10.1002/pol.1967.110050203

Cited by 9 publications

(2 citation statements)

References 9 publications

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“…Researchers have been broadening the field of polymer chemistry because Braconnot produced the first synthetic polymer, nitrocellulose, nearly 200 years ago in 1833 1 . In the recent two decades, researchers have focused the most on biodegradable and biocompatible polymers 2–5 .…”

Section: Introductionmentioning

confidence: 99%

Advances in cyclic ester ring‐opening polymerization using heterogeneous catalysts

Naz,

Abdur,

Mumtaz

et al. 2023

Applied Organom Chemis

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Aliphatic polyesters' propensity to be biocompatible and biodegradable, as well as their prospective applications in the medical and agricultural industries, has prompted much research into their synthesis. As ring‐opening polymerization (ROP) technology has advanced rapidly, the invention of discrete, thoroughly characterized heterogeneous catalysts, which are potent polymerization initiators for ROP, has received much attention during the last decade. Numerous polyester microstructures have been produced because of recent developments in the catalyst design of new heterogeneous catalysts and applied in initiating the ROP of cyclic esters. This study reviewed the ROP of cyclic ester catalysts composed of a heterogenous catalyst such as metal–organic frameworks (MOFs) and supported catalyst. MOFs are crystalline porous materials with tunable frameworks that make them potential mediums for polymerization. The MOF structure's precise design is important to control polymerizations because it provides control over both primary and higher‐order structures. Additionally, the stability of the heterogeneous catalyst is also discussed. Finally, the conclusion to the previous study and a stance for future prospects is given. This article intends to provide valuable information for building a heterogeneous catalyst for the ROP of cyclic esters with enhanced activity.

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Section: Introductionmentioning

confidence: 99%

Advances in cyclic ester ring‐opening polymerization using heterogeneous catalysts

Naz,

Abdur,

Mumtaz

et al. 2023

Applied Organom Chemis

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“…PAcN in solution has been shown to be degradable by light and heat, but less degradation has been observed in the solid state [7]. In this regard, it seems advantageous to study the properties and structure of PAcN in bulk.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of rigid‐chain polyacenaphthylene

Chen

Piirma

1978

J. polym. sci., C Polym. symp.

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SYNOPSISRigid-chain polyacenaphthylene (PAcN) was synthesized by a novel emulsion polymerization method that besides water and the sodium oleate emulsifier consisted of a water-soluble initiator, K2S208. and the water-insoluble (at the polymerization temperature SOo), crystalline monomer acenaphthylene. The molecular weight of the emulsion PAcN was 150.000 by gel permeation chromatography (gpc). With the exception of a CI3 nuclear magnetic resonance study, the PAcN was characterized in the bulk state by infrared spectroscopy and x-ray and electron diffraction. The CI3 nmr spectrum in solution suggests a macromolecular association. The infrared spectra indicate that the PAcN can be either paracrystalline or amorphous. An amorphous infrared band at 670 cm-I was identified. The emulsion PAcN is predominantly threo-disyndiotactic, and it is possible. therefore, to have a mesophase of nematic type in the bulk state. The paracrystallinity or ordered structure of PAcN is supported by wide-angle x-ray and electron diffraction patterns.

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Appendix B: Robert Simha Publications

2010

Polymer Physics

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On the instability of polyacenaphthylene in solution

Cited by 9 publications

References 9 publications

Advances in cyclic ester ring‐opening polymerization using heterogeneous catalysts

Advances in cyclic ester ring‐opening polymerization using heterogeneous catalysts

Synthesis and characterization of rigid‐chain polyacenaphthylene

Appendix B: Robert Simha Publications

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