Abstract
Biodegradable plastics were produced from sweet potato pulp (SPP) and cationic starch (CS) or chitosan composite (CC) by compression molding and their mechanical properties were tested. A universal testing machine, Rockwell hardness tester, and Izod impact tester were used for testing the mechanical properties (flexural strength, Rockwell hardness, and Izod strength) of the plastics. A central composite second-order design was used to study the effects of temperature, time, and moisture content on the flexural strength, Rockwell hardness, and Izod strength of SPP/CS and SPP/CC blended plastics. The flexural strength, Rockwell hardness, and Izod strength of SPP-based plastics was 101.1-305.9 kg/cm2, R29.0-R96.7, and 0.6-3.0 kg cm cm-2, respectively. Regression analysis predicted the optimal mechanical properties (flexural strength, Rockwell hardness, and Izod strength) to be attained with a 150-160°C temperature, 15-20-min reaction time, and 20-23% moisture content.
Original language | English |
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Pages (from-to) | 423-434 |
Number of pages | 12 |
Journal | Journal of Applied Polymer Science |
Volume | 83 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2002 Jan 10 |
Keywords
- Flexural
- Izod
- Response surface methodology
- Rockwell hardness
- Sweet potato pulp
ASJC Scopus subject areas
- General Chemistry
- Surfaces, Coatings and Films
- Polymers and Plastics
- Materials Chemistry