Synthesis and properties of poly(amide‐imide‐urethane) thermoplastic elastomers

Wang, Tzong-Liu; Huang, Fang-Jung

doi:10.1002/(sici)1097-0126(199808)46:4<280::aid-pi992>3.0.co;2-#

Cited by 24 publications

(3 citation statements)

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“…They are (a) by reacting isocyanate terminated PU prepolymer with dianhydride. [25,26] (b) reacting isocyanate terminated PU with diols or diacids containing imide groups, [27] (c) reacting blocked PU prepolymer with dianhydride [28] and (d) reacting blocked PU prepolymer with poly(amic acid) (PAA). [19] In this work, we have prepared PUI according to method (d).…”

Section: Introductionmentioning

confidence: 99%

Preparation of Nanoporous Polyimide Films from Poly(urethane‐imide) by Thermal Treatment

Krishnan

Cheng

et al. 2003

Macro Materials & Eng

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Nanoporous polyimide films were prepared in two steps. The first step is the preparation of poly(urethane‐imide) films by casting blend solutions containing various weight percentages of poly(amic acid) and phenol blocked polyurethane prepolymer (from 1,6‐hexamethylene diisocyanate and poly(ethylene glycol)). Three poly(amic acid)s were obtained from biphenyltetracarboxylic dianhydride (or) 2,2‐bis(3,4‐dicarboxyphenyl)hexafluoropropane dianhydride with 1,4‐phenylenediamine (or) 2,5‐dimethyl‐1,4‐phenylenediamine. Poly(urethane‐imide) films were characterized by density and surface energy measurements, AFM, DSC, TMA, mechanical properties and TGA. In the second step, these films were thermally treated above 300 °C to give nanoporous polyimide films. During thermal treatment, less thermally stable urethane domains decomposed, leaving porous polyimide films. The presence of pores was confirmed by scanning electron microscopy (SEM). The dielectric constant of the polyimide film was found to decrease with increasing amounts of urethane content.A nanoporous polyimide film.magnified imageA nanoporous polyimide film.

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Section: Introductionmentioning

confidence: 99%

Preparation of Nanoporous Polyimide Films from Poly(urethane‐imide) by Thermal Treatment

Krishnan

Cheng

et al. 2003

Macro Materials & Eng

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“…It should be noted that although some poly(amideimide-urethane) thermoplastic elastomers have been reported, which exhibit a large elongation at break, the rigidity (tensile strength) of poly(amide-imide-urethane) is much lower than that of the TPU-PAI substrate. 31,32 More importantly, the rigidity and flexibility of the PAI-TPU substrate is controllable by varying the ratio of TPU to PAI due to the high compatibility between PAI and TPU. For the superhydrophobic coating, a silane coupling agent named FAS-17 containing fluorinated alkyl chains was grafted on the surface of SiO 2 nanoparticles.…”

Section: Papermentioning

confidence: 99%

Self-assembly of hierarchical porous structure for stretchable superhydrophobic films by delicately controlling the surface energy

Hou,

Noh,

Yue

et al. 2023

Mater. Adv.

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“…The increasing interest in diisocyanates can be attributed to their diverse applications in polyurethane coatings, adhesives and rubber vulcanizates. In addition, polyurethane polymers and their copolymers have been extensively applied in various areas, such as in construction, automobiles, liquid crystals and in medicine 8–12…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of novel optically active poly(imide–urethane)s derived from N,N′‐(pyromellitoyl)‐bis‐(L‐leucine) diisocyanate and aromatic diols

Mallakpour

Shahmohammadi

2003

Polymer International

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N,N′‐(Pyromellitoyl)‐bis‐(L‐leucine) diacid was reacted with ethyl chloroformate in the presence of triethylamine followed by reaction with activated sodium azide and gave N,N′‐(pyromellitoyl)‐bis‐(L‐leucine) diacylazide in high yield. This diacylazide was heated in dry benzene and gave the unstable N,N′‐(pyromellitoyl)‐bis‐(L‐leucine) diisocyanate (5) in quantitative yield. Thus, diisocyanate 5 was generated in situ and polycondensation reaction of this monomer with several aromatic diols, such as 4,4′‐dihydroxybiphenyl, 1,4‐hydroquinone, bisphenol A, phenolphthalein and 1,4‐dihydroxyanthraquinone, was performed in dry toluene under refluxing in the presence of 1,4‐diazabicyclo[2.2.2]octane (triethylenediamine) as a catalyst. The polymerization reactions proceeded within 48 h, producing a series of optically active poly(imide–urethane)s with good yield and moderate inherent viscosity in the range 0.18–0.28 dl g−1. All of the above polymers were fully characterized by infrared spectra, elemental analyses and specific rotation. Some structural characterization and physical properties of these optically active poly(imide–urethane)s are reported Copyright © 2003 Society of Chemical Industry

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Synthesis and properties of poly(amide‐imide‐urethane) thermoplastic elastomers

Cited by 24 publications

References 0 publications

Preparation of Nanoporous Polyimide Films from Poly(urethane‐imide) by Thermal Treatment

Preparation of Nanoporous Polyimide Films from Poly(urethane‐imide) by Thermal Treatment

Self-assembly of hierarchical porous structure for stretchable superhydrophobic films by delicately controlling the surface energy

Synthesis and characterization of novel optically active poly(imide–urethane)s derived from N,N′‐(pyromellitoyl)‐bis‐(L‐leucine) diisocyanate and aromatic diols

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