High glass transition temperature polymers development

There are multiple techniques under development to stabilize the bulk heterojunction and consequently improve performance stability the use of ternary blends with compatibilizers, such as, block copolymers, amorphous fullerene derivatives, high glass transition temperature polymers, thermos-cleavable polymers, specifically designed donor-acceptor systems with enhanced interactions, functionalized side chains on the polymer and cross-linkable materials (Mulherin et al., 2011). The cross-linking materials... 

A major development in fluoroplastks is the recent small scale production of Teflon AF, a noncrystaUme (amorphous) fluorocarbon polymer with a high glass transition temperature (240 °C) This optically transparent TFE copolymer is soluble m certan fluorocabons and has the same chemical and oxidative stability as crystallme TFE homopolymers [5]... 

These polymerization methods were carried out to produce small quantities of polymers for DSC and GPC analysis. These analyses were used to measure the efficiency of the polymerization and the glass transition temperature of the resulting polymers, as a screen for further development of selected materials. It was deemed at the time of the tests that a high glass transition temperature was... 

Early transition metal catalysts such as vanadium complexes and zirconocenes effectively copolymerize ethene with norbornene [81]. This capabihty eventually led to the commercial development of the APEL and TOPAS line of cyclic olefin copolymers by Mitsui and Ticona (formerly Hoechst), respectively [82]. Interest in this class of polymers is due to its high glass transition temperatures and transparency that is imparted by the norbornene component. 

In the early 1960s, a new class of addition polymer and addition poly(imide)s was developed by the Rhone Poulenc company. The most important of these were /jw-maleimides (BMI) [12, 13], which could be crosslinked or copolymerized to form thermosets with outstanding thermal and chemical resistance. These materials cure without volatile by-products, thereby, minimizing the formation of voids, and have high glass transition temperatures and low moisture absorption. The major uses of this class of resin is in advanced composites and printed circuit boards. 

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