ISSN:
1436-2449
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Summary Cyclopentene (CP) and 7,8-bis(trifluoromethyl)tricyclo-[4,2,2,02,5]-deca-3,7,9-triene (p-A) were copolymerized. The copolymers were thermally converted to acetylene-cyclopentene copolymers ACP-13, ACP-11, and ACP-31 containing 60.3%, 48.3% and 39.4% of CP, respectively. Infrared spectroscopy showed the copolymers to have increasing sequence length of conjugated double bonds with increasing acetylene contents. The copolymers have only small amounts of unpaired spins which are only one-tenth to one-hundredth of that found in normal trans-poly(acetylene). The copolymers absorb large quantities of iodine, which on the basis of sp 2-carbon atoms are comparable to iodine doped poly(acetylene). Doped ACP-copolymers acquire some increase of conductivity up to 10−4 (Ω cm)−1 for ACP-31 copolymer and evacuation returned the materials to their insulating states even though the samples retained a few mole % of I3 −. The results are attributed to low carrier concentration and mobility.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00275598
