October 1, 2019 by admin 0 Comments

The Evolution of Bio-based Plastics beyond Petrochemical Plastics

Authors
Dongyeop Oh, Hwang Seongyeon, Park Jeyeong
Abstract
Environmental and health concerns force the search for sustainable plastics that utilise bio-derived monomers. However, previously reported bio-derived thermosets or thermoplastics rarely offer thermal/mechanical properties, scalability, or recycling that match those of petrochemical plastics. Here, we report the production of high performance bio-based plastics. 1. tough biodegradable plastics. 2. high Tg super engineering bio-based plastics.

October 1, 2019 by admin 0 Comments

Polyimide for Flexible Organic Electronic Device Substrates

Authors
Seung Woo Lee (†)
Abstract
For flexible organic electronic device substrates, polymer materials should provide high gas barriers, flexibility, toughness and processability and desirable thermal and chemical properties. Of the many available polymeric materials, polyimides (PIs) have been widely used in the electronic device industry due to their high glass transition temperature, dimensional stability and heat resistance, as well as their excellent mechanical, adhesion and dielectric properties. Several concepts of colorless PI films have recently been proposed that reduce charge-transfer complexation by introducing fluorine groups, asymmetrical and bulky pendent units, or alicyclic units in the polymer structure to overcome the drawbacks of PI films.