Poly(ethylene terephthalate) reinforced by <i>N,N</i>′‐diphenyl biphenyl‐3,3′,4,4′‐tetracarboxydiimide moieties

Xiao, Jun; Wan, Xinhua; Zhang, Dong; Zhang, Ye; Zhou, Qifeng; Turner, S. Richard

doi:10.1002/pola.10169

Cited by 16 publications

(19 citation statements)

References 14 publications

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“…From Figure 2(b), it can be seen that the crystallization temperatures of branched PBS copolymers are all lower than that of neat PBS, and decrease gradually with the increasing of 1,2‐OD segments content, indicating that the introduction of 1,2‐OD segments hindered the crystallizability of PBS. The supercooling degree (Δ T = T m − T c ) is an important parameter for determining the crystallizability of polymers 27. Generally speaking, the larger Δ T value, the lower the crystallizability.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterizations of branched poly(butylene succinate) copolymers with 1,2‐octanediol segments

Wang

Gao

et al. 2010

J of Applied Polymer Sci

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Branched poly(butylene succinate) (PBS) copolymers were synthesized, from succinic acid (SA), 1,4-butanediol (1,4-BD), and 1,2-octanediol (1,2-OD) through a two-step process containing esterification and polycondensation, with different mole fractions of 1,2-OD segments. The branched PBS copolymers were characterized with 1 H-NMR, differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD), thermogravimetric analysis (TGA), dynamic rheological testing, and tensile properties analysis. The results of DSC and WAXD show that, with the increasing of the 1,2-OD segments content, the glass transition temperature (T g ), melting temperature (T m ), crystallization temperature (T c ), and the degree of crystallinity (X c ) decrease. While the crystal structure of PBS does not change by introducing 1,2-OD segments. The results of TGA and dynamic rheological testing indicate that the thermal stability of neat PBS is improved with the addition of 1,2-OD segments. The incorporation of 1,2-OD segments has some effects on the rheological properties of PBS, such as complex viscosities (|g*|), storage modulus (G 0 ), and loss modulus (G 00 ). Tensile testing demonstrates that the elongation at break is improved significantly with increasing 1,2-OD segments content, but without a notable decrease of tensile strength.

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Section: Resultsmentioning

confidence: 99%

Synthesis and characterizations of branched poly(butylene succinate) copolymers with 1,2‐octanediol segments

Wang

Gao

et al. 2010

J of Applied Polymer Sci

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“…Polymers containing 3,3′‐diamino‐4,4′‐dihydroxydiphenylsulfone exhibited enhanced solubility compared with polymers containing 2,2‐bis(3‐amino‐4‐hydroxyphenyl) hexafluoropropane because of the insolubility of the former polymer in dimethyl sulfoxide (DMSO), N , N ‐dimethylformamide (DMF), N ‐methyl‐2‐pyrrolidone (NMP) and N , N ‐dimethylacetamide (DMAc) Rigid groups are incorporated to distort the regularity of the main chain , . The rigidities of these groups should not be significantly different from those of heterocyclic polymers.…”

Section: Introductionmentioning

confidence: 99%

“…Rigid groups are incorporated to distort the regularity of the main chain , . The rigidities of these groups should not be significantly different from those of heterocyclic polymers.…”

Section: Introductionmentioning

confidence: 99%

“…Trifluoromethyl groups have also been used as typical solubility-improving substituents for poly(benzoxazole)s. 14 -20 (2) Rigid groups are incorporated to distort the regularity of the main chain. 23,24 The rigidities of these groups should not be significantly different from those of heterocyclic polymers. This method could improve the solubility and maintain the thermal stability of polymers.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced solubility of novel poly(benzoxazole)s with a soft linkage and a rigid pendant group

Zhuang

Liu

et al. 2012

Polymer International

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Aromatic poly(benzoxazole)s are a class of rigid‐rod conjugated polymers. However, their poor solubility in organic solvents limits potential applications. Thus, a good method that can address this dilemma is needed, given that existing methods involve models with either poor solubility but good thermal stability or good solubility but poor thermal stability. In this paper we report a novel aromatic poly(benzoxazole) with a soft linkage and a rigid pendant group. Structural characterizations of the polymers via Fourier transform infrared and proton nuclear magnetic resonance spectroscopy reveal the formation of a benzoxazole ring and an imide ring. The introduction of rigid pendant groups improved the solubility and enhanced the thermal stability of the polymer, which was impaired by the incorporation of the soft linkage. Most of these polymers are soluble at room temperature or when heated in dimethyl sulfoxide, N,N‐dimethylformamide or N,N‐dimethylacetamide. Some polymers can even be dissolved in m‐cresol and tetrahydrofuran. A 10% weight loss in these polymers was observed at temperatures over 410 °C. Moreover, the incorporation of the imide pendant group increased the conjugation length of the polymer structural unit and accelerated electron delocalization. Copyright © 2012 Society of Chemical Industry

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“…Polyimides are one of the most important commercial polymers because of their good thermal properties and mechanical properties 17,18. To our knowledge, the combination of polyesters and polyimides has achieved great success and yielded a series of new materials with high performance 19–23. Xiao et al19 modified poly(ethylene terephthalate) (PET) by the incorporation of imide structures.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Properties of Poly(butylene succinate) Reinforced by Trimellitic Imide Units

Liu¹,

Li²,

Zhang³

et al. 2006

Macro Chemistry & Physics

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Summary: A series of high molecular weight poly(butylene succinate) copolyester containing rigid imide units were synthesized in this paper. The chemical structure and composition of the copolyesters were determined by 1H NMR spectroscopy and Fourier transform infrared spectroscopy (FT‐IR). Gel permeation chromatography (GPC) was employed to determine the molecular weight and molecular weight distribution. The differential scanning calorimetry (DSC) technique showed that the melting temperature (Tm) of the copolyester decreased slightly with the increment in trimellitic imide unit content. When the imide unit content was increased to 6.3 mol‐%, it had an elongation at break of 510% (83% higher than that of PBS) and a tensile strength of 37 MPa (7% higher than that of PBS). The changes in mechanical properties of the copolyester might be owed to the compositive effects of spherulitic morphology and imide units.

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Poly(ethylene terephthalate) reinforced by N,N′‐diphenyl biphenyl‐3,3′,4,4′‐tetracarboxydiimide moieties

Cited by 16 publications

References 14 publications

Synthesis and characterizations of branched poly(butylene succinate) copolymers with 1,2‐octanediol segments

Synthesis and characterizations of branched poly(butylene succinate) copolymers with 1,2‐octanediol segments

Enhanced solubility of novel poly(benzoxazole)s with a soft linkage and a rigid pendant group

Synthesis, Characterization and Properties of Poly(butylene succinate) Reinforced by Trimellitic Imide Units

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