Abstract
Hydroxyl carbon nanotubes were surface modified by acetic anhydride to reduce its polarity and then melt blended with biodegradable polyester poly(butylenesadipate-co-terephthalate) as a reinforcing filler. After surface modification, nanotubes show higher contact angle and uniformly dispersion in polymer matrix. Dynamic thermomechanical analysis was employed to investigate interfacial adhesion between nanotubes and polymer matrix, which proving that storage modulus of composites increased after adding acetic anhydride. In addition, hardness, Young’s modulus, yielding stress as well as thermal stability of composites are all elevated with the addition of acetic anhydride, which should contribute to their commercial application.
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