Minh = 0-44 dL/g (25.0 °C, 0.5% solution (w/w), sulfuric acid).

No abstract

Biphenylene end-capped polyquinoline prepolymers of DP = 3,11, and 22 were prepared by adjusting the stoichiometry of the bis(amino ketone) monomer, 4,4'-diamino-3,3,-dibenzoyldiphenyl ether, the bis(ketomethylene) monomer, 4,4'-diacetyldiphenyl ether, and the ketomethylene end cap, 2-acetylbiphenylene. Melt processing of the prepolymers in the presence of bis(triphenylphosphine)dicarbonylnickel{0) was carried out at 325-340 °C under 500 psi to give high-quality transparent films. Very short cure times (15 min) were realized in the presence of the nickel(O) catalyst, and the resulting films were 75-100% insoluble, had increased TVs, and showed improved mechanical properties both above and below the Tt as compared with the uncured resins. On the basis of model reactions and the observation that the degree of cross-linking in the cured resins was essentially independent of the DP of the prepolymer, chain extension by conversion of biphenylene end caps to tetrabenzocyclooctatetraene linkages was proposed to be the major reaction of the biphenylene end groups, with cross-linking occurring to a lesser extent after the chain length increased and the concentration of biphenylene ends decreased.

The undergraduate chemistry curriculum traditionally has emphasized small molecule chemistry, but recent studies and pedagogical efforts regarding the chemistry core curriculum have encouraged the inclusion of macromolecular topics in the core curriculum (1). However, this is problematic due to a scarcity of suitable curricular materials and faculty concerns regarding their own lack of formal training in the polymer area and the limited time available for them to learn about polymers. The National Science Foundation has funded a proposal from the POLYED Center at the University of WisconsinStevens Point that addresses these concerns.The project, entitled "Incorporating Polymeric Materials Topics into the Undergraduate Chemistry Core Curriculum", initially involved naming a team of five NSF-POLYED Scholars through the POLYED Center. The Scholars are college and university faculty with prior experience in the development of curricular materials for college chemistry courses and having a range of experience in the polymer area. They are Professors Guy Literature Cited 1. a) "Innovative Approaches to the Teaching of Introductory Chemistry" Proceedings of an ACS CPT, DiuCHED, and NSF Symposium at the Washington ACS meeting,

The Committee on Polymer Education (PolyEd) had its initial planning meeting in 1974. The Intersociety Polymer Education Council (IPEC) has been active since 1990 as an outgrowth of PolyEd. Because of the activities of PolyEd and IPEC, basic polymer concepts have become a required part of undergraduate education and a more common topic in the curriculum for K–12 students. A brief history of polymer education is given. The current and future activities of PolyEd and IPEC are described.