Gas transport properties of hyperbranched polyimide/hydroxy polyimide blend membranes

Suzuki, Tomoyuki; Miki, Masako; Yamada, Yasuharu

doi:10.1016/j.eurpolymj.2012.06.004

Cited by 28 publications

(22 citation statements)

References 35 publications

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“…They are well known for their superior resistance to spontaneous pyrolysis and oxidative degradation [5,6]. Therefore, they are used as adhesives, film forming materials, composite matrices, coatings, membranes, and in aerospace, transportation, microelectronics, fuel cell, optoelectronics, etc., in severe environments [7][8][9][10]. However, their insoluble nature in most organic solvents and their high softening and glass transition temperatures (T g ) make these systems difficult to process and fabricate [11].…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of new thermally stable and organo-soluble polyamide-imides from phosphorus-containing aromatic amines and various dianhydrides

Agrawal

Narula

2013

Journal of Polymer Engineering

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Imide ring containing novel polyamide-imides (PAIs) were prepared by triphenyl phosphite-activated polycondensation of phosphorus-containing aromatic amines, bis(3-aminophenyl) isopropyl phosphine (BAP) and bis(3-aminophenyl) aminotolyl phosphine (TAP), with various diimide-diacids (DIDAS). All polymers were fully characterized by FTIR, 1 H-NMR, 13 C-NMR, 31 P-NMR spectroscopy and elemental analysis. These polymers showed no significant weight loss below 419°C and glass transition temperatures (T g ) in the region of 231°C-290°C. The resulting polymeric films exhibited high optical transparency. The inherent viscosity of the synthesized polymers was in the range 0.55-0.85 dl/g and wide angle X-ray diffraction measurements revealed that these polymers were predominantly amorphous.

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Section: Introductionmentioning

confidence: 99%

Facile synthesis of new thermally stable and organo-soluble polyamide-imides from phosphorus-containing aromatic amines and various dianhydrides

Agrawal

Narula

2013

Journal of Polymer Engineering

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“…The UV-shielding mechanism of the FPI/FHBPI composite films is shown in Figure 7b. Due to the introduction of FHBPI, the ultraviolet absorption capacities of the FPI/FHBPI composites are obviously enhanced compared to the reported pure PI matrix [38]. FPI/FHBPI composites are better PI substrates if we want to further enhance the ultraviolet absorption capacities of PI by adding fillers.…”

Section: Uv-shielding Performancementioning

confidence: 98%

“…Different from linear PI molecules, HBPI molecules possess a spherical structure. This structure brings more cavities to the matrix, which lays a foundation for use as gas separation materials [38]. Moreover, HBPI can be applied to the field of optics by modification of terminal functional groups [39,40].…”

Section: Introductionmentioning

confidence: 99%

Fluorinated Linear Copolyimide Physically Crosslinked with Novel Fluorinated Hyperbranched Polyimide Containing Large Space Volumes for Enhanced Mechanical Properties and UV-Shielding Application

Chen

Guo

et al. 2020

Polymers

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Fluorinated hyperbranched polyimide (FHBPI), a spherical polymer with large space volumes, was developed to enhance fluorinated linear copolyimide (FPI) in terms of mechanical, UV-shielding, and hydrophobic properties via simple blend and thermal imidization methods. FPI possessed superior compatibility with FHBPI, and no obvious phase separation was found. The incorporation of FHBPI led to the formation of physical crosslinked network between FPI and FHBPI, which markedly improved the mechanical properties of the FPI, resulting in maximum enhancement of 83% in tensile strength from 71.7 Mpa of the pure FPI to 131.4 Mpa of the FPI/FHBPI composite film containing 15 wt % of FHBPI. The introduction of FHBPI also changed the surface properties of composites from hydrophilicity to hydrophobicity, which endowed them with outstanding dielectric stability. Meanwhile, the thin FPI/FHBPI composites kept the high transparency in the visible spectrum, simultaneously showing enhanced UV-shielding properties and lifetimes under intense UV ray. This was attributed to the newly formed charge transfer complex (CTC) between FHBPI and FPI. Moreover, the FPI/FHBPI composites possessed preeminent thermal properties. The properties, mentioned above, gave the composites enormous potential for use as UV-shielding coatings in an environment filled with high temperatures and strong ultraviolet rays.

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“…The gas transport properties of hb-PI blend membranes of 4,4 0 -(hexafluoroisopropylidene) diphthalic anhydride/1,3,5-tris(4-aminophenoxy)benzene (6FDA/TAPOB) and 4,4 0 (hexafluoroisopropylidene) diphthalic anhydride/ 3,3 0 -dihydroxybenzidine (6FDA/HAB) blends and their silica hybrid membranes were investigated by Suzuki et al [289]. The formation of a hb-PI blend silica hybrid membrane is presented in Scheme 34 in a simplified manner.…”

Section: Hyperbranched Polyimide-silica As a Gas Separation Membranementioning

confidence: 99%

Aromatic Hyperbranched Polymers: Synthesis and Application

Ghosh

Banerjee

Voit

2014

Porous Carbons – Hyperbranched Polymers – Polymer Solvation

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Hyperbranched (hb) polymers have been receiving increasing attention because of their unique architecture that results in an interesting set of unusual chemical and physical properties. Over the past decade quite a number of excellent reviews on hb polymers have been published by different research groups, covering various aspects of this class of polymers. This review will highlight the work on aromatic hb polymers of the last decade, emphasizing general synthetic strategies and recent development of alternative synthetic strategies, and discussing various aspects of hb polymers to demonstrate their wide range of applications.

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Gas transport properties of hyperbranched polyimide/hydroxy polyimide blend membranes

Cited by 28 publications

References 35 publications

Facile synthesis of new thermally stable and organo-soluble polyamide-imides from phosphorus-containing aromatic amines and various dianhydrides

Facile synthesis of new thermally stable and organo-soluble polyamide-imides from phosphorus-containing aromatic amines and various dianhydrides

Fluorinated Linear Copolyimide Physically Crosslinked with Novel Fluorinated Hyperbranched Polyimide Containing Large Space Volumes for Enhanced Mechanical Properties and UV-Shielding Application

Aromatic Hyperbranched Polymers: Synthesis and Application

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