Abstract
The importance of norbornenyl endcapped polyimide oligomers is amply documented as is the preparation of these oligomers by the in-situ condensation of diamines with norbornyl anhydrides or half acid/half esters (Polymerized Monomeric Reactants - PMR). While the initial imidization of PMR resins is both readily achieved and is well understood the polymerization of the norbornyl endcaps requires relatively high temperatures and still requires further elucidation. From studies it has become clear that the polymerization of the endcaps is occurring either as a result of, or in parallel to a simple retro Diels-Alder reaction resulting in some cyclopentadiene evolution in monomer endo/exo isomerization. This paper reports efforts in the study of a modified norbornenyl imide endcap which cannot undergo a retro Diels-Alder reaction and is not subject to endo/exo isomerization. The benzannulated norbornadienyl imide derivative (BZ) offers the opportunity to explore polymerization chemistry in the absence of these processes and could also afford polymers with higher aromatic content with a possible improvement in thermo-oxidative stability.
Original language | English |
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Pages (from-to) | 327-329 |
Number of pages | 3 |
Journal | Annual Technical Conference - Society of Plastics Engineers |
State | Published - 1986 |
Externally published | Yes |