SYNTHESIS OF Α,ω-Alkanediols. A REVIEW

Patwardhan, S. A.

doi:10.1080/00304949409458163

Cited by 7 publications

(2 citation statements)

References 42 publications

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“…Many further examples of such multistep approaches to α,ω-long-chain compounds have been reported. − While they are elegant in providing even components with a very large number of carbon atoms precisely, they are very tedious and rather inefficient as a source of monomers for purposes others than model polymers on a small scale.…”

Section: Sources Of Monomersmentioning

confidence: 99%

Long-Chain Aliphatic Polymers To Bridge the Gap between Semicrystalline Polyolefins and Traditional Polycondensates

2016

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Other than their established short-chain congeners, polycondensates based on long-chain difunctional monomers are often dominated by the long methylene sequences of the repeat units in their solid-state structures and properties. This places them between traditional polycondensates and polyethylenes. The availability of long-chain monomers as a key prerequisite has benefited much from advances in the catalytic conversion of plant oils, via biotechnological and purely chemical approaches, likewise. This has promoted studies of, among others, applications-relevant properties. A comprehensive account is given of long-chain monomer syntheses and the preparation and physical properties, morphologies, mechanical behavior, and degradability of long-chain polyester, polyamides, polyurethanes, polyureas, polyacetals, and polycarbonates.

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Section: Sources Of Monomersmentioning

confidence: 99%

Long-Chain Aliphatic Polymers To Bridge the Gap between Semicrystalline Polyolefins and Traditional Polycondensates

2016

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“…The synthesis of pure, aliphatic a,odiol monomers can be accomplished by several methods. [8] However, to obtain longer diols of high purity (! than 22 consecutive methylene groups), several steps are typically required, with overall yields that are rather low.…”

Section: Introductionmentioning

confidence: 99%

Macromolecular Crystal Engineering Based on Segmented Polymers: Influence of Heteroatoms on the Thermal Properties and Crystallization of m,n‐Polyurethanes Derived from Long‐Chain, Heteroatom‐Containing, Monodisperse α,ω‐Diols

McKiernan

Cardoen

Boutevin

et al. 2003

Macro Chemistry & Physics

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Long‐chain heteroatom‐containing telechelic diols with 29–32 atoms in the backbone were synthesized by a one‐step, free‐radical telomerization of 10‐undecene‐1‐ol with commercially available α,ω‐dithiols. The oxygen and sulfur atoms caused a decrease in the melting point and enthalpy of the diols, compared to the corresponding purely aliphatic diols. The heteroatom‐containing α,ω‐diols HO(CH2)11S(CH2)2X(CH2)2S(CH2)11OH, where X = CH2, O, or O(CH2)2O, were reacted in the melt with 1,6‐diisocyanatohexane OCN(CH2)6NCO, producing a series of polyurethanes containing an increasing amount of heteroatoms. Characterization by differential scanning calorimetry, infra‐red spectroscopy, thermogravimetric analysis, and wide angle x‐ray scattering of the m,n‐polyurethane series showed that, like the telechelic diols they were synthesized from, the heteroatoms caused a decrease in the melting point and enthalpy. However, they did not affect either the decomposition temperature or the crystal structure/packing.Typical decomposition behavior of all the heteroatom‐containing m,6‐polyurethane.magnified imageTypical decomposition behavior of all the heteroatom‐containing m,6‐polyurethane.

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ChemInform Abstract: Synthesis of α,ω‐Alkanediols

Patwardhan¹

1995

ChemInform

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SYNTHESIS OF Α,ω-Alkanediols. A REVIEW

Cited by 7 publications

References 42 publications

Long-Chain Aliphatic Polymers To Bridge the Gap between Semicrystalline Polyolefins and Traditional Polycondensates

Long-Chain Aliphatic Polymers To Bridge the Gap between Semicrystalline Polyolefins and Traditional Polycondensates

Macromolecular Crystal Engineering Based on Segmented Polymers: Influence of Heteroatoms on the Thermal Properties and Crystallization of m,n‐Polyurethanes Derived from Long‐Chain, Heteroatom‐Containing, Monodisperse α,ω‐Diols

ChemInform Abstract: Synthesis of α,ω‐Alkanediols

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