An NMR and DSC-investigation of the poly(vinyl chloride)-dioctylphthalate system

✍ Scribed by T.U. Gevert; S.E. Svanson

• Book ID: 103072136
• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 281 KB
• Volume: 21
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(85)90198-3

✦ Synopsis

It has been demonstrated that the system poly(vinyl chloride)-dioctylphthalate (PVC DOP) gives rise to distinct component lines in the wide-line NMR spectrum. These lines correspond to very different degrees of segmental mobility of the material within a large interval of temperatures. We consider that these component lines correspond to at least two PVC-phases of the samples since no established phase separation occurs and since the narrow line registered at higher temperatures vanishes at room temperature. DOP itself exhibits a very narrow line at room temperature. The DSC-results indicate a variety of phases since the transition region occurs over a wider temperature interval when the amount of DOP increases. The Tg of PVC also decreases nearly lineary with the DOP-content. This result indicates an inhomogeneous structure of the system.