Abstract
A series of soft to tough copolymers have been prepared by the cationic copolymerization of the modified linseed oils Dilulin (Dil) or ML189 with dicyclopentadiene (DCPD) initiated by boron trifluoride diethyl etherate (BFE). The yields of the bulk copolymers are essentially quantitative, while the yields of the crosslinked copolymers remaining after Soxhlet extraction with methylene chloride range from 84% to 90% and depend on the amount of DCPD used. Soxhlet extraction and solid-state 13 C NMR spectra indicate that the bulk copolymers consist of a crosslinked oil-DCPD network interpenetrated with certain amounts of soluble components, such as the free oil, oil-DCPD oligomers and some low molecular weight oil fragments. The Tgs of the resulting Dil-DCPD and ML189DCPD copolymers range from 15-83 o C and 8-77 o C, respectively, and have a linear relationship with the amount of DCPD used. Moreover, the Tgs of the Dil-DCPD copolymers are higher than the ML189-DCPD copolymers. DMA analysis reveals that the tan δ values for both copolymers are in the range 0.7-1.1. The room temperature storage moduli increase with an increase in the amount of DCPD and range from 4.43×10 6 Pa to 1.52×10 9 Pa for the
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
