Journal of Polymers and the Environment

, Volume 16, Issue 1, pp 12–18 | Cite as

Biodegradability of Chemically Modified Starch (RS4)/PVA Blend Films: Part 2

  • Yeon-Hum Yun
  • Young-Jung Wee
  • Hun-Soo Byun
  • Soon-Do Yoon
Original Paper


Biodegradable films were successfully prepared by using cornstarch (CS), chemically modified starch (RS4), polyvinyl alcohol (PVA), glycerol (GL), and citric acid (CA). The physical properties and biodegradability of the films using CS, RS4, and additives were investigated. The results of the investigation revealed that the RS4-added film was better than the CS-added film in tensile strength (TS), elongation at break (%E), swelling behavior (SB) and solubility (S). Especially, the RS4/PVA blend film with CA as an additive showed physical properties superior to other films. Furthermore, when the film was dried at low temperature, the properties of the films clearly improved because the hydrogen bonding was activated at low temperature. The biodegradation of films was carried out using the enzymatic, microbiological and soil burial test. The enzyme used in this study was amyloglucosidase (AMG), α-amylase (α-AM) and β-amylase (β-AM). At the enzymatic degradation test, the GL-added films had an approximately 60% degradation, while the CA-added films were degraded about 25%. The low degradation value on CA-added film is attributed to low pH of film added CA that deactivated the enzymatic reaction. The microbiological degradation teat was performed by using Bacillus subtilis and Aspergillus niger.


Chemically modified starch (RS4) Physical properties Biodegradability 



This work was supported by the Development of District Industrial Technology (10022112), the Ministry of Commerce, Industry and Energy. I am really thankful to president Hyung-Soo Lim of Litmus Chemicla Co., Ltd.


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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Yeon-Hum Yun
    • 1
  • Young-Jung Wee
    • 2
  • Hun-Soo Byun
    • 3
  • Soon-Do Yoon
    • 4
  1. 1.Department of Geosystem EngineeringChonnam National UniversityKwangjuSouth Korea
  2. 2.School of Biological Sciences and TechnologyChonnam National UniversityKwangjuSouth Korea
  3. 3.Department of Chemical System EngineeringChonnam National University, YeosuYeosuSouth Korea
  4. 4.Department of Applied Chemical EngineeringChonnam National UniversityKwangjuSouth Korea

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