High Performance Polymers 

About: High Performance Polymers is an academic journal published by SAGE Publishing. The journal publishes majorly in the area(s): Polyimide & Epoxy. It has an ISSN identifier of 0954-0083. Over the lifetime, 2294 publications have been published receiving 24888 citations.

The Use, Design, Synthesis, and Properties of High Performance/High Temperature Polymers: An Overview

Abstract: An overview of the definition and development of, factors that contribute to, applications and markets for and the design of high performance/high temperature polymers is presented. Of the many families of high performance/high temperature polymers known, the most popular families consisting of polyimides, polyarylene ethers and phenylethynyl-terninated oligomers are used to demonstrate the basic principles in polymer development. Chemical structure/property relationships are used to show how polymers can be designed with a unique combination of properties. The estimated worldwide market for high temperature polymers in 2000 was 206,700,000 kgs constituting $4.36B with polyimides comprising 3,982,000 kgs or $1 .07B (24% of the dollar value). With an improvement in the world economy, this market is predicted to grow substantially

Low-melting Phthalonitrile Oligomers: Preparation, Polymerization and Polymer Properties:

Abstract: A series of low-melting phthalonitrile oligomers were prepared in which variable-length multiple aromatic ether linkages interconnect the terminal phthalonitrile units These materials were designed to address the need for a processable resin system with good high-temperature properties The melt-processable oligomers are obtained using a modified-Ullman ether reaction between a bisphenol and a dihalobenzene to form a hydroxyl-terminated oligomeric intermediate that is endcapped by reaction with 4-nitrophthalonitrile Viscosity measurements show that the phthalonitrile oligomers are polymerized at a moderate temperature (200°C) using the typical aromatic diamine curing additives, bis[4-(4-aminophenoxy)phenyl]sulfone and 1,3-bis(3-aminophenoxy)benzene The oligomeric phthalonitrile/diamine mixtures exhibit a low complex melt viscosity (001-01 Pa s) at 200°C Differential scanning calorimetric analysis is used to follow the polymerization as the oligomeric phthalonitrile/diamine mixtures are heated to ele

Synthesis of novel organic-soluble high-temperature aromatic polymers

Abstract: This paper reviews our current work on the synthesis of new organic-soluble aromatic polyamides and polyimides having high glass transition temperatures above 300 °C. Our strategy to achieve this goal is to introduce a bulky pendant phenyl group along the polymer backbone and to incorporate a crank and twisted non-coplanar structure into the polymer main chain.

Molecular Design of Heat Resistant Polyimides Having Excellent Processability and High Glass Transition Temperature

Abstract: The relationship between the imide structures and morphology are discussed in order to develop heat resistant polyimides having excellent processability and toughness. Addition-type imide oligomers consisting of asymmetric 2,3,3′,4′-biphenyltetracarboxylic dianhydride (a-BPDA) and 3,4′-oxydianiline (3,4′-ODA) and/or 4,4′-oxydianiline (4,4′-ODA) with 4-phenylethynyl phthalic anhydride (PEPA) were synthesized and characterized. The imide oligomers derived from 3,4′-ODA; 4,4′-ODA (50:50) comonomer having molecular weights of 5240 g mol−1 (Oligo-10) and 1340 g mol−1 (Oligo-1.5) showed good solubility in aprotic solvents such as DMAc and NMP, and were successfully cured at 370°C for one hour. The thermal curing process, and thermal and rheological properties of the imide oligomers were investigated by FT-IR, differential scanning calorimetry, thermogravimetric analysis, and dynamic rheometry. It was observed that the melt flow dramatically decreased above the Tg for Oligo-1.5, resulting in a viscosity as low a...

Synthesis and Characterization of Polyimides Based on 3,6-Diphenylpyromellitic Dianhydride:

Abstract: 3,6-Diphenylpyromellitic dianhydride (DPPMDA) has been synthesized from 2,5-diphenyl-3,4-bis(4-methoxyphenyl)cyclopentadiene-1-one and dimethyl acetylenedicarboxylate. The monomer was polymerized w...