“…Infrared absorption has been found to be a valuable tool in the study of the fine structure of polyethylene. In table 1 are listed the absorption bands in the 2 to 15 µ region that have been observed in polyethylene (1,39,56,100,158,248,249,274,436,439,440,441,467,482,501,502) and their assignment to the various molecular xdbrations. Infrared study has recently been supplemented by Raman spectra of crystalline polyethylene and long-chain hydrocarbons (357,534).…”