Examples of 'cyclic ester' in a sentence
Meaning of "cyclic ester"
cyclic ester: A cyclic ester is a chemical compound that contains an ester functional group within a ring structure or cyclic molecule. These compounds are commonly used in polymer chemistry and organic synthesis due to their unique reactivity and properties
How to use "cyclic ester" in a sentence
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cyclic ester
An example of a cyclic ester that may be used is caprolactone.
Any alteration to larger or smaller ring size reduces the amount of cyclic ester.
Lactide is a cyclic ester comprising of two lactic acid molecules.
This is particularly useful for reducing crystallinity of a cyclic ester after polymerization for adjustment.
High conversions of cyclic ester monomers to copolymers are reported in the tables below.
The so purified condensed phase composition then consists at least essentially of the cyclic ester.
The water sensitive cyclic ester may be selected from a variety of substances.
E-caprolactone can be used as the cyclic ester compound.
Lactide is a cyclic ester formed by two lactic acid molecules that can be controlledly polymerized.
Determination method for the cyclic ester compound,.
The cyclic ester can be recrystallized using a solvent such as ethyl acetate or diethyl ether.
E-caprolactone or the like can be used as the cyclic ester compound.
A cyclic ester which is very particularly preferred is e-caprolactone.
The cyclic compounds include cyclic ester compounds and / or cyclic urethane compounds.
The non-aqueous solvent of the invention can further contain a cyclic ester.
See also
In addition to the cyclic ester monomer, polymerisation catalyst is added.
Process and apparatus for purification of a stream containing a cyclic ester of an alpha-hydroxycarboxylic acid.
Derivatives of cyclic ester UK-2A useful for prevention or treatment of fungal diseases.
In aqueous solution, gluconic acid exists in equilibrium with the cyclic ester glucono delta-lactone.
A cyclic ester is weighed, dissolved in tetrahydrofuran, and then analyzed.
The water generated can open a cyclic ester and thus generate a “ parasitic ” initiator.
An AB block copolymer according to embodiment 12 wherein the first cyclic ester is glycolide.
A process of manufacturing a polyester from cyclic ester monomer, wherein the method comprises the steps of,.
The use of a Sn-based catalyst may be particularly preferred for cyclic ester monomers.
The cyclic compounds include the above-noted cyclic ester compound and the cyclic urethane compound.
The cyclic ester is formed through a depolymerization ( transesterification ) reaction of the oligomeric a-hydroxyacid.
The copolymer of Claim 2 wherein the cyclic ester is glycolide.
However, the cyclic ester ( lactide ) obtained by these methods also has some drawbacks.
An ABA block polymer according to embodiment 12 wherein the first cyclic ester is glycolide.
Preferred ratios between the cyclic ester compound ( a ) and the cyclic ester compound ( b ) are as follows.
The lactone employed has a 5 to 7 membered cyclic ester ring.
Preferably, the cyclic ester of the alpha-hydroxycarboxylic acid is lactide or glycolide, more preferably lactide.
Conditions for gas chromatography analysis, A cyclic ester composition is analyzed.
Such a cyclic ester compound ( a ) is described in International Publication No.
The solvent, unreacted amine, and cyclic ester were removed by distillation.
A plant as shown in Fig . 1 was operated with lactide as cyclic ester.
The copolymer of claim 1 wherein the cyclic ester has from a 5 to 9 membered ring.
The composition of Claim 1 wherein the 3-hydroxyacid ester is a cyclic ester.
Preferably, the cyclic ester is Y-butyrolactone.
As the cyclic ester compound ( a ), a compound represented by the following formula ( 1a ) is particularly preferable.
The composition of Claim 5 wherein the cyclic ester is the triolide of 3-hydroxybutyrate.
Preferably, the cyclic ester of formula ( I ) is lactide.
It is preferable that the cyclic backbone of the cyclic ester compound ( a-1 ) has 6 carbon atoms.
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