Abstract
The heat-resistance of PLA is so poor that its application area was limited. It can be widely applied after improvement. In the process of making cotton stalk bast fibers reinforced PLA composites, adding TAIC a type of cross-linking agent in the experiment produces a kind of composites with good heat-resistance. Orthogonal experiment table including length and mass fraction of fibers, molding temperature and addition of TAIC was devised. Then the study focused on the heat-resistance of the composites and the analysis of range and variance were done. The optimal processing condition was obtained: length of fibers was 10mm, mass fraction of fibers was 30%, molding temperature was 175°C and addition of TAIC was 1%. In addition, fibers reinforced PLA composites without TAIC had better heat-resistance than the pure PLA material, the HDT raised 54°C, and the composites added TAIC obtained the best heat-resistance of all. This composite can be extensively used in many fields.
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