V. Chytrý, B. Obereigner, D. Lím
Jun 1, 1973
Citations
0
Influential Citations
5
Citations
Journal
European Polymer Journal
Abstract
Abstract The decompositions of the following poly(vinylacetate) models were investigated in the gas phase: 2-acetoxypentane (in the range 323–380°), meso and racem. 2,4-diacetoxypentane (325–375°), 4-acetoxy-1-pentene (302–375°), 4-acetoxy-2-pentene (314–381°), 5-acetoxy-2-hexene (328–391°), and 7-acetoxy-3,5-nonadiene (299–361°). The decompositions are homogeneous unimolecular first-order reactions with rate constants of 1·04 × 10 13 exp(−45·/ RT , 1·63 × 10 13 exp(−45·4/ RT ), 1·01 × 10 13 exp(−44·5/ RT ), 5 sd 76 × 10 12 exp(−42·8/ RT ), 2·01 × 10 13 exp(−45·5/ RT ), and 3·29 × 10 12 exp(−41·5/ RT ) sec −1 , respectively. The two 2,4-diacetoxypentane stereoisomers decompose at almost the same rate. From the course of decomposition of models in the gas phase, possible conclusions about decomposition of polymer are drawn. The role of configuration of sequences, double bonds, their number and geometric isomerism in the macromolecular chains are discussed in connection with elimination of acetic acid from poly(vinyl acetate).