Method for forming composite materials
AssigneeChung Yuan Christian University
InventorsTsung-Yen Tsai, Shao-Wen Lu, Wei-Chuan Shiu, Syuan-Ci Su, Tzu-Fang Chen, Chao-Chen Hsu
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Abstract
Disclosed is layered double hydroxides (LDH) used to catalyze the polymerization of polyethylene terephthalate (PET). The LDH of a catalyst amount may efficiently reduce the PET polymerization period and further be uniformly blended into the PET product to form composites. Compared with the pure PET, the composite including LDH has better properties such as mechanical properties, linear expansion coefficient, barrier, thermal stability, and transparency. In addition, the LDH in the composite is safer than conventional heavy metal catalysts, especially when applied to food or drink packages.
Claims5
A method for forming a composite material, comprising:
- uniformly blending a polyethylene terephthalate monomer and a catalyst consisting of a layered double hydroxide to form a mixture;
- and
- polymerizing the polyethylene terephthalate monomer in the presence of the layered double hydroxide as the sole polymerization catalyst by heating to form the composite material of polyethylene terephthalate and the layered double hydroxide.
Dependencies are inferred from the claim text.