Citation: Li Chen a, Xin-lan Zhang a, Huai-yuan Li b, Bo Li a, Ke Wang a, Qin Zhang a, Qiang Fu a. Superior Tensile Extensibility of PETG/PC Amorphous Blends as Induced via Uniaxial Stretching℃[J]. Chinese Journal of Polymer Science, ;2011, 29(1): 125-132. doi: 10.1007/s10118-010-1006-6 shu

Superior Tensile Extensibility of PETG/PC Amorphous Blends as Induced via Uniaxial Stretching℃

Received Date: 27 January 2010
Revised Date: 5 March 2010

In this work, we report a simultaneous increase of both stiffness and extensibility in Poly(ethylene glycol-co-cyclohexane-1,4-dimethanol terephthalate) (PETG)/polycarbonate (PC) blends prepared through the slit die extrusion - uniaxial cold stretching process. The stretched sheets have a unique mechanical character that increased tensile modulus is accompanied by increased extensibility as increasing of the drawn ratio. Especially, a sharp increasing of the extensibility is observed for PETG/PC (70/30 wt.-%) blend at drawn ratio between 8.2 and 20.0, where nine times increase of extensibility is achieved. The mechanism of stretching-induced superior extensibility is investigated via micrograph observation, rheolometry and calorimetric analysis. The observed superior extensibility could be tentatively explained by the bridging effect of the PC microfibril on the crack development during tensile failure.
- In situ fibrillation,
- Amorphous blends,
- Extensibility,
- Uniaxial stretching
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