𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Structure and physical properties of reprocessed poly(ether imide)

✍ Scribed by S. Bastida; J. I. Eguiazábal; J. Nazábal

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
182 KB
Volume
63
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

The effects of reprocessing by injection molding on the structure and properties of poly(ether imide) (PEI) were studied. The chemical structure of PEI does not change after reprocessing. However, the weight-average molecular weight decreases after the first and the second injection cycles, after which it stays constant. Despite the harsh conditions used, the thermal resistence and the small strain mechanical properties were unaffected by the application of successive injection molding processes to the 100% regrind PEI specimens. The tensile ductility and energy at break showed a decrease parallel to that of the molecular weight. However, the Izod impact strength was constant, probably due to the differences in strain rate and mode of deformation between the tensile and impact tests.

📜 SIMILAR VOLUMES

Thermal properties of melt-blended poly(
Thermal properties of melt-blended poly(ether ether ketone) and poly(ether imide)
✍ Yong Sung Chun; Heon Sang Lee; Hyun Chul Jung; Woo Nyon Kim 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 135 KB 👁 2 views

The thermal properties of blends of poly(ether ether ketone) (PEEK) and poly(ether imide) (PEI) prepared by screw extrusion were investigated by differential scanning calorimetry. From the thermal analysis of amorphous PEEK-PEI blends which were obtained by quenching in liquid nitrogen, a single gla

Structure and properties of a poly(amino
Structure and properties of a poly(amino ether) resin after reprocessing in the melt state
✍ A. Granado; J. I. Eguiazábal; J. Nazábal 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 202 KB 👁 1 views

## Abstract The effects of reprocessing by extrusion for up to five cycles, at both the usual (200°C) and an extreme (230°C) temperature, on the structure and mechanical properties of a poly(amino ether) (PAE) resin were studied. A slight darkening and viscosity increase was observed, mainly upon r

Synthesis and properties of new adamanta
Synthesis and properties of new adamantane-based poly(ether imide)s
✍ Sheng-Huei Hsiao; Ching-Tang Lee; Yaw-Terng Chern 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 186 KB 👁 2 views

A new adamantane-based bis(ether anhydride), 2,2-bis [4-(3,4-dicarboxyphenoxy)phenyl]adamantane dianhydride, was prepared in three steps starting from nitrodisplacement of 4-nitrophthalonitrile with the potassium phenolate of 2,2-bis(4hydroxyphenyl)adamantane. A series of adamantane-containing poly(