Normal co-ordinate analysis of 1–4 trans polybutadiene

✍ Scribed by N. Neto; C. Di Lauro

• Book ID: 103069905
• Publisher: Elsevier Science
• Year: 1967
• Tongue: English
• Weight: 484 KB
• Volume: 3
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(67)90051-1

✦ Synopsis

The frequencies of the active fundamental vibrations of 1-4 trans polybutadiene and of its symmetrical deutero-derivatives, viz. (CH2--L-'T)--~-~CD--CH2)~, (CD2--CH~----CH--CDz)~ and (CD2wCD---CD--CD2)~, have been calculated by means of valence force constants derived from cyclo-olefms.

The method for obtaining the kinetic and potential energy matrices for an isolated polymer chain is briefly discussed, and compared with a procedure previously presented in the literature.

A detailed discussion of the i.r. spectrum of 1-4 trans polybutadiene, based on normal co-ordinate analysis, is given. * Stretching constants are in units of mdyn/A.; Stretch-bend interaction in units of mdyn/rad; Bending constants in units of mdynA/(rad) z.

I" Symbols like if, f', ft ', ft', if,, are closely related to those used in Ref. (1). O O o~ o .'7" O Gr ¢:x. O ~4