Journal ArticleDOI
Melt-Processable Poly(ether imide)s Based on Catechol Bis(ether anhydride)
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TLDR
In this article, a preliminary assessment of the properties of the polymers prepared from the catechol bis(ether anhydride) and a variety of diamines was provided, which demonstrated the possibility of synthesizing high molecular weight poly(ether imide)s with ortho-linked main-chain units from bis (ether an hydride)s derived from Catechol or its derivatives.Abstract:
Having previously demonstrated the possibility of synthesizing high molecular weight poly(ether imide)s with ortho-linked main-chain units from bis(ether anhydride)s derived from catechol or its derivatives, we now provide a preliminary assessment of the properties of the polymers prepared from the catechol bis(ether anhydride) and a variety of diamines. The polymers have low color, are soluble in a variety of solvents, and are thermally stable to temperatures in excess of 470 °C. Glass transition temperatures are comparable with or higher than that of the commercial poly(ether imide) Ultem. Solvent-cast films have high modului and strengths. Extensions to break are relatively low, except for the polymer based on 4,4‘-bis(4-aminophenoxy)biphenyl, which has an extension of 170%. All the polymers can be drawn to produce materials with higher moduli and strengths and, in most cases, higher extensions to break. Thus the polymers can be processed from the melt or from solution.read more
Citations
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Journal ArticleDOI
Recent advances in the development of processable high-temperature polymers1
TL;DR: In this article, a review deals with recent developments in the chemistry of high-temperature polymers that have led to improvements in processability and hightemperature stability, which has found widespread use in aerospace and electronics applications.
Journal ArticleDOI
Synthesis and characterization of new adamantane-based polyimides
Sheng-Huei Hsiao,Chin-Tang Li +1 more
TL;DR: In this paper, a new adamantane-based dietheramine, 2,2-bis[4-(4-aminophenoxy)phenyl]adamantane, was prepared in two steps from chloro displacement or p-chloronitrobenzene with the potassium phenolate of 2, 2-bis(4-hydroxyphenyl)adamants, followed by hydrazine catalytic reduction of the intermediate dinitro compound.
Journal ArticleDOI
Synthesis and Characterization of Highly Soluble and Oxygen Permeable New Polyimides Based on Twisted Biphenyl Dianhydride and Spirobifluorene Diamine
TL;DR: In this paper, a spirobifluorene diamine diamine monomer, 2,7-bis-amino-2,4,7,di-tert-butyl-9,9‘-spirobifi-orene, was obtained, which is composed of a noncoplanar twisted biphenyl unit containing bulky ptert butylphenyl groups.
Journal ArticleDOI
Synthesis and properties of fluorinated polyimides. 3. Derived from novel 1,3-bis[3′-trifluoromethyl-4′(4″-amino benzoxy) benzyl] benzene and 4,4-bis[3′-trifluoromethyl-4′(4-amino benzoxy) benzyl] biphenyl
TL;DR: In this article, diamine monomers, such as 1,3-bis[3′-trifluoromethyl-4′(4-amino benzoxy) benzyl] biphenyl (V) have been synthesized.
Journal ArticleDOI
Highly transparent polyimide hybrids for optoelectronic applications
TL;DR: In this paper, the incorporation of hydroxyl groups on the backbones of polyimides is an important strategy to enhance the solubility and provide reactive sites for organic-inorganic bonding.
References
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Journal ArticleDOI
Synthesis and properties of novel aromatic polyimides of 2,3-bis(4-aminophenoxy)naphthalene
Chin Ping Yang,Wen Tung Chen +1 more
TL;DR: In this article, the authors synthesize bisphenoxy naphthalene units from 2,3-bis(4-aminophenoxy)naphthalenes (BAPON) and various aromatic tetracarboxylic dianhydrides by the usual two-step procedure that included ring-opening polyaddition to give poly(amic acid)s, followed by cyclodehydration to polyimides.
Journal ArticleDOI
Synthesis of bis(ether anhydride)s for poly(ether imide)s having 1,2-linked units by nitrodisplacement with catechol derivatives
G. C. Eastmond,J. Paprotny +1 more
TL;DR: In this paper, a bis(4-aminophenyl) ether was converted to high-molecular-weight polymers using solution polymerization with chemical imidization, and the polymers formed have lower glass transition temperatures than polymers based on the hydroquinone-based bis(ether anhydride) and have far greater solubilities and processability than corresponding polymers.
Journal ArticleDOI
Polymides from Phenylenediamines and Aliphatic Diacids
P. W. Morgan,S. L. Kwolek +1 more
Journal ArticleDOI
Isomeric poly(ether imide)s: synthesis, thermal properties and permeabilities
TL;DR: In this article, a series of poly(ether imide)s formed as isomeric pairs of polymers by interchanging the diol and diamine derived units were synthesized.
Book ChapterDOI
Structure-property relationships in linear aromatic polyimides
TL;DR: In this article, the effects of structural changes in the polyimide backbone upon the physical and mechanical properties of these polymers have been extensively investigated, including processability, glass transition and melt temperatures, solubility, colour and dielectric constant.
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