Synthesis and characterization of semiaromatic polyamides with dicyclohexane units

Yan, Guangming; Zhang, Gang; Ren, Haohao; Li, Yan; Yang, Jie

doi:10.1039/c6ra13021f

Cited by 16 publications

(22 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results indicated that the T d and T max decreased with the introduction of the increasing weight percentage of long alkyl segments from polyamide salt. This can be ascribed to the relatively low stability of aliphatic methyl at high temperature . However, the thermal stability was virtually maintained, with the incorporation of BABA/SA salt into the polymeric backbone.…”

Section: Resultsmentioning

confidence: 99%

“…This can be ascribed to the relatively low stability of aliphatic methyl at high temperature. 36 However, the thermal stability was virtually maintained, with the incorporation of BABA/SA salt into the polymeric backbone. From the result of TGA analysis, the new series of copolyamides show good thermal stability (onset degradation temperature is over 350 C), which is adequate for most common applications.…”

Section: Thermal and Crystalline Properties Of Baba-sa Salt And Pa6-bmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and characterization of copolyamides derived from novel aliphatic bio‐based diamine

Rwei

Ranganathan

Chiang

et al. 2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

Novel aliphatic nylon 6 (PA6) copolyamides were produced by melt polymerization reaction of our newly synthesized aliphatic bio‐based diamine monomer: N1, N6‐bis (4‐aminobutyl) adipamide (BABA). The pertinent long‐chain polyamide salt (BABA/SA) monomer was isolated as white solid, utterly characterized for the first time. The chemical structure of BABA, BABA/SA salt, and copolyamides (PA6‐BABA/SA) were investigated by 1H NMR and FTIR spectroscopy. Depending on the chemical compositions, the viscosity and molecular weight of the copolyamides were in the range of 20 275–12 652 and 2.81–2.12 dL/g. With increasing BABA/SA salt weight content in the synthesized copolyamides, their melting temperatures (Tm) and glass transition temperatures (Tg) decreased from 211.0 to 164.0 °C and 66.6 to 43.5 °C. In addition XRD results were investigated revealing all the copolyamides transferred from α‐form to γ‐form. Interestingly, the as‐synthesized all copolyamides possess nearly similar thermal stability (Td = 452.2–449.5 °C) as neat PA6. Mechanical testing data revealed that with increasing BABA/SA salt content, the elongation at break of copolyamides are increased (726.19–429.34%), while the tensile strength are decreased. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46878.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Thermal and Crystalline Properties Of Baba-sa Salt And Pa6-bmentioning

confidence: 99%

Synthesis and characterization of copolyamides derived from novel aliphatic bio‐based diamine

Rwei

Ranganathan

Chiang

et al. 2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The polarity of anionic groups confers water solubility on dyes that bear these anionic groups. Unlike these traditional dyes, the polymeric black dye is a kind of polyampholyte, and its solubility was affected not only by the anionic groups but also by the molar ratio of the cationic to anionic groups . The sulphonic acid group (–SO 3 H) ionises to anionic sulphonate (–

{SO}_{3}^{-}

) at pH > 1, and the amounts of protonated amino groups in the PVAm are related to the external pH .…”

Section: Resultsmentioning

confidence: 99%

Synthesis and application to cotton of a polymeric black colorant prepared by grafting of reactive dyes to polyvinylamine

Yang

Teng

2017

Coloration Technology

View full text Add to dashboard Cite

A novel polymeric black dye was synthesised by grafting yellow, orange, red, and blue reactive dyes onto polyvinylamine. Such a polymeric black dye takes the onus away from dyers to worry about the compatibility of individual dyes. The polymeric black dye was characterised by Fourier transform infrared, ultraviolet‐visible, and nuclear magnetic resonance spectroscopy. The absorption of the polymeric black dye in aqueous solution was nearly constant across the wavelength range 400–700 nm. Compared with a black mixture of reactive dyes with low fixation on cotton, which was prepared by mixing yellow, orange, red, and blue reactive dyes, the polymeric black dye reached 99% fixation on cotton through the use of a crosslinking agent. The colorimetric properties of cotton dyed with the polymeric black dye and with the black mixture of reactive dyes showed that better blackness can be obtained by using the polymeric black dye. Analysis of the thermal stability and penetration ability of the polymeric black dye showed that the polymeric dye has high stability in the application and a uniform distributution in the cotton fabric.

show abstract

“…Liu et al synthesized the novel semi-aromatic polyamide with long carbon chain diamines; its melting point was about 310 °C [11]. Additionally, in terms of changing the crystal structures of semi-aromatic polyamide, alicyclic was introduced into the molecular chain of semi-aromatic polyamide by Yan et al (T g = 217.2-236.9 °C) [12], azo units by Huang et al [13], triazole units by Ivanysenko et al (T g = 161 °C) [14], hyperbranched units by Shabbir et al (T g = 138-198 °C) [15], sulphone groups by Shabanian et al [16] and by Li et al (T g = 121-177 °C) [17], or long carbon chain diamines by Zhang et al (T g = 163-203 °C) [18] into the polymer's chain to improve the resin's solubility.…”

Section: Introductionmentioning

confidence: 99%

Novel semi-aromatic polyamides containing ether bond and pendant methyl group: synthesis and properties

Ren

Fan

et al. 2021

Polym. Bull.

Self Cite

View full text Add to dashboard Cite

Through synthesizing novel difluoro-monomer (1,6-N,N'-bis(4-fuorobenzamide) trimethylhexane (BFBT)) and adjusting the structure of bisphenol monomer (hydroquinone (HQ) or 4,4'-biphenol (BH)), two kinds of novel semi-aromatic polyamides (HQ-BBT and BH-BBT) containing ether bond and pendant methyl were synthesized in this work. The inherent viscosities of these obtained polymers were in the range of 0.921-1.151 dLg −1 . The polyamides HQ-BBT and BH-BBT exhibited high glass transition temperatures (T g ) of 144-160 °C and weight loss temperature (T 5% ) of 401-406 °C. The resultant polyamides HQ-BBT and BH-BBT showed good melting flowability with complex viscosities of 1931-252 Pa s and 3829-376 Pa s, respectively, and they can be hot-pressed into thin films, which showed tensile strengths of 64.4-64.6 MPa and storage modulus over 1.28 GPa at about 150 °C, indicating their good thermal and mechanical properties. Interestingly, we found that the aggregation structures of these two kinds of polymers were quite different with the addition of different bisphenol. HQ-BBT with HQ as monomer was amorphous and can be dissolved in polar solvents such as NMP, DMF and so on, while BH-BBT with BH as monomer was found to be crystalline polymer with moderate melting point of 245 °C and much higher glass transition temperature of 160 °C. These moderate T m and T g were very beneficial for the melting processing of the highperformance polymers.

show abstract

Synthesis and characterization of semiaromatic polyamides with dicyclohexane units

Abstract: The resultant semiaromatic polyamides showed excellent mechanical properties, superior thermal properties and good processability.

Cited by 16 publications

References 28 publications

Synthesis and characterization of copolyamides derived from novel aliphatic bio‐based diamine

Synthesis and characterization of copolyamides derived from novel aliphatic bio‐based diamine

Synthesis and application to cotton of a polymeric black colorant prepared by grafting of reactive dyes to polyvinylamine

Novel semi-aromatic polyamides containing ether bond and pendant methyl group: synthesis and properties

Contact Info

Product

Resources

About