Synthesis and Characterization of Novel Thermotropic Aromatic-Aliphatic Biodegradable Copolyesters Containing<scp>D</scp>,<scp>L</scp>-Lactic acid (LA), Poly(butylene terephthalate) (PBT) and Biomesogenic Units

Wei, Peng; Wang, Li; Huang, Shuohan; Wang, Xinhang; Chen, Yuwei; Wang, Yanping; Wang, Yimin

doi:10.1080/03602559.2014.919655

Cited by 7 publications

(2 citation statements)

References 33 publications

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“…The most promising lignin-based polyester monomers are phenolic acids: vanillic, syringic, 4-hydroxybenzoic, floretic (3-(4-hydroxyphenyl)propionic), 4-hydroxycinnamic, ferulic (3-methoxy-4-hydroxycinnamic), dihydroferulic, etc. [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. 4-Hydroxybenzoic and vanillic acids are aromatic self-condensable AB-type monomers.…”

Section: Introductionmentioning

confidence: 99%

Fully Aromatic Thermotropic Copolyesters Based on Vanillic, Hydroxybenzoic, and Hydroxybiphenylcarboxylic Acids

Mikhaylov,

Zuev,

Golubev

et al. 2024

Polymers

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Several series of new polymers were synthesized in this study: binary copolyesters of vanillic (VA) and 4′-hydroxybiphenyl-4-carboxylic (HBCA) acids, as well as ternary copolyesters additionally containing 4-hydroxybenzoic acid (HBA) and obtained via three different ways (in solution, in melt, and in solid state). The high values of logarithmic intrinsic viscosities and the insolubility of several samples proved their high molecular weights. It was found that the use of vanillic acid leads to the production of copolyesters with a relatively high glass transition temperature (~130 °C). Thermogravimetric analysis revealed that the onset of weight loss temperatures of ternary copolyesters occurred at 330–350 °C, and the temperature of 5% mass loss was in the range of 390–410 °C. Two-stage thermal destruction was observed for all aromatic copolyesters of vanillic acid: decomposition began with VA units at 420–480 °C, and then the decomposition of more heat-resistant units took place above 520 °C. The copolyesters were thermotropic and exhibited a typical nematic type of liquid crystalline order. The mechanical characteristics of the copolyesters were similar to those of semi-aromatic copolyesters, but they were much lower than the typical values for fully aromatic thermotropic polymers. Thus, vanillic acid is a mesogenic monomer suitable for the synthesis of thermotropic fully aromatic and semi-aromatic copolyesters, but the processing temperature must not exceed 280 °C.

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Section: Introductionmentioning

confidence: 99%

Fully Aromatic Thermotropic Copolyesters Based on Vanillic, Hydroxybenzoic, and Hydroxybiphenylcarboxylic Acids

Mikhaylov,

Zuev,

Golubev

et al. 2024

Polymers

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“…The great interest both in academic and industrial fields of the past decades was the use of monomers from biobased renewable sources. The most promising biobased polyester monomers are 2,5-furandicarboxilic, vanillic, syringic, 4-hydroxybenzoic, floretic (3-(4-hydroxyphenyl)propionic), 4-hydroxycinnamic, ferulic (3-methoxy-4-hydroxycinnamic), dihydroferulic acids [18][19][20][21][22][23][24][25][26]. Structurally, vanillic acid is similar by structure to 4-hydroxybenzoic acid, excluding presence of side -OCH3 group, possessing mesogenic properties, and suitable as comonomer for TMCPs syntheses.…”

Section: Introductionmentioning

confidence: 99%

Fully Aromatic Thermotropic Copolyesters Based on Vanillic, Hydroxybenzoic and Hydroxybiphenylcarboxylic Acids

Mikhaylov,

Zuev,

Golubev

et al. 2024

Preprint

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Several series of new polymers were synthesized: binary copolyesters of vanillic (VA) and hydroxybiphenylcarboxylic (HBCA) acids, as well as ternary copolyesters additionally containing hydroxybenzoic acid (HBA) and obtained via three different ways (in solution, in melt and in solid state). The high values of logarithmic intrinsic viscosities and insolubility of several samples proved its high molecular weights. It has been shown that the use of vanillic acid leads to the production of copolyesters with a relatively high glass transition temperature (about 130°C). Thermogravimetric analysis revealed onset of weight loss temperatures of ternary copolyesters occurred at 330-350 °C, the temperature of 5% mass loss is in the range of 390-410 °C. Two-stage thermal destruction is observed for all aromatic copolyester of vanillic acid: decomposition begins with VA units at 420-480 °C, and then decomposition of more heat-resistant units demonstrated above 520 °C. The copolyesters are thermotropic and exhibit a typical nematic type of liquid crystalline order. Mechanical characteristics of copolyesters are close to those for semi-aromatic copolyesters, but are much lower than typical values for fully aromatic thermotropic polymers. Thus, vanillic acid is a mesogenic monomer suitable for the synthesis of thermotropic fully aromatic and semi-aromatic copolyester, but resulting processing temperature must not exceed 280°C.

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Hydrolytic and thermal oxidative degradation behavior of thermotropic aromatic–aliphatic copolyesters

Wei

Wang

Xia

et al. 2016

J Therm Anal Calorim

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Synthesis and Characterization of Novel Thermotropic Aromatic-Aliphatic Biodegradable Copolyesters ContainingD,L-Lactic acid (LA), Poly(butylene terephthalate) (PBT) and Biomesogenic Units

Cited by 7 publications

References 33 publications

Fully Aromatic Thermotropic Copolyesters Based on Vanillic, Hydroxybenzoic, and Hydroxybiphenylcarboxylic Acids

Fully Aromatic Thermotropic Copolyesters Based on Vanillic, Hydroxybenzoic, and Hydroxybiphenylcarboxylic Acids

Fully Aromatic Thermotropic Copolyesters Based on Vanillic, Hydroxybenzoic and Hydroxybiphenylcarboxylic Acids

Hydrolytic and thermal oxidative degradation behavior of thermotropic aromatic–aliphatic copolyesters

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