Effect of Annealing on the Crystallization of Poly Vinyl Chloride for Drug Delivery System

Authors

  • Basma A. Abdul-Majeed Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq
  • Hussain K. Hussain Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq
  • Nagam A. Kafel Al-Sultanee Chemical Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq

DOI:

https://doi.org/10.31699/IJCPE.2012.2.3

Keywords:

poly (vinyl alcohol)–annealing–swelling- crystallinity.

Abstract

Poly vinyl alcohol has been studied for its ability to form crystallites by using annealing method. Semicrystalline films of poly vinyl alcohol (PVA) were prepared by casting 11.5 wt. % and 13 wt. % PVA aqueous solution onto glass slides at annealing temperature range 90 -120°C and duration time 15- 60 minute. This allowed the macromolecules to form crystallites, small regions of folded and compacted chains separated by amorphous regions where single PVA chain may pass through several of these crystallites. Degree of crystallinity of PVA films (hydrogels) was determined by method of density; on the other hand the swelling behavior was conducted by the determination of water uptake, wet degree of crystallinity, gel fraction and solubility. The results of PVA films showed that water uptake decreased with increasing temperature, time of annealing and PVA concentration, while degree of crystallinity increased, and gel fraction and solubility decreased with increasing temperature and time of annealing. The maximum dry and wet degree of crystallinity was 64% and 36% respectively at 120°C and 60 min.

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Published

2012-06-30

How to Cite

A. Abdul-Majeed, B., K. Hussain, H., & A. Kafel Al-Sultanee, N. (2012). Effect of Annealing on the Crystallization of Poly Vinyl Chloride for Drug Delivery System. Iraqi Journal of Chemical and Petroleum Engineering, 13(2), 29-36. https://doi.org/10.31699/IJCPE.2012.2.3

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