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Title page for etd-0828114-114825


URN etd-0828114-114825 Statistics This thesis had been viewed 956 times. Download 0 times.
Author CHING-YI HSIAO
Author's Email Address No Public.
Department Materials Engineering
Year 2013 Semester 2
Degree Master Type of Document Master's Thesis
Language Chinese&English Page Count 131
Title Effect of Different Chain Length Acids (C6, C8, C10 and C12) Modified by Methane Sulfonic Acid and Temperature on the Properties of Thermoplastic Starch/Glycerin Blends
Keyword
  • Tensile stress
  • Chain length acids
  • Methane sulfonic acid
  • Tapioca starch (TPS)
  • Tapioca starch (TPS)
  • Methane sulfonic acid
  • Chain length acids
  • Tensile stress
  • Abstract In this study, various chain length acids (C6, C8, C10 and C12) modified by methane sulfonic acid (MSA) and temperature were used to modify tapioca starch(ST), then the glycerol (GA) were added into modified starch, to prepare a new blends.The mechanical properties, thermal properties and physical properties of blends were studied. This investigation was divided into two parts.
    In section 1, the new biodegradable materials were use of starch and glycerol with hexanedioic acid (HA), suberic acid (SBA), sebacic acid (SA), decanedicarboxylic acid (DA) manufacturing with different temperatures (90℃, 110℃and 130℃). And then the solution was added into modified starch to prepare the blends by using single-screw extruder. The FT-IR patterns indicated that the characteristic peak of C=O in ester was observed at 1730cm-1. It proved that different chain length acids (C6, C8, C10 and C12) was reacted with glycerol by esterification and was used to plasticize blends during extrusion. In addition, the blends would improve the hydrolysis and thermal stability. The water contact angle increased from 43.0° to 64.0°.
    In section 2, the HA blend (110℃), SBA blend (110℃), SA blend (110℃), DA blend (130℃) was used in study, because they possessed good mechanical properties, water resistances and thermal stability. In this part, the various contents (0, 0.005, 0.010, 0.020g) of MSA were also used to modify the mechanical properties of blends. We observed that the blends were added to MSA, and then the FT-IR patterns indicated the C=O in ester was appeared at 1730 cm-1 present. For this reason, the hydrophobic blends were produced. The water contact angle of the MSA blends increased from 55.0° to 71.0°. Although break elongation of the MSA blends reduced from the original 220% to 128%, the stress increased from 2.5 MPa to 5.1 MPa. Therefore, the optimal composition of blends was the DA blend (130℃) added to MSA(0.005g).
    Advisor Committee
  • Chi-Yuan Huang - advisor
  • Jen-Taut Yeh - co-chair
  • Kan-Nan Chen - co-chair
  • Wen-Yen Chiang - co-chair
  • Files indicate not accessible
    Date of Defense 2014-07-17 Date of Submission 2014-08-28


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