Citation: Ling-pu Meng, Yuan-fei Lin, Jia-li Xu, Xiao-wei Chen, Xue-yu Li, Qian-lei Zhang, Rui Zhang, Nan Tian, Liang-bin Li. A Universal Equipment for Biaxial Stretching of Polymer Films[J]. Chinese Journal of Polymer Science, ;2015, 33(5): 754-762. doi: 10.1007/s10118-015-1623-1 shu

A Universal Equipment for Biaxial Stretching of Polymer Films

1.
National Synchrotron Radiation Lab and College of Nuclear Science and Technology, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230029, China

Received Date: 16 September 2014
Revised Date: 16 October 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (Nos. 51227801, 51325301).

A biaxial stretching equipment was designed and constructed to enable fundamental studies of the relationship between film processing conditions and structures of oriented film products. With programmable drive motors and scissor-like mechanism, all stretching modes, including uniaxial stretching with constant and free width, simultaneous and sequential biaxial stretching, can be applied to a square-shaped sheet. Parameters related to film stretching manufacturing, such as temperature, draw ratio and stretching speed can be set independently to meet the requirement of different polymers. The force information during stretching is recorded by two miniature tension sensors in two directions independently, which can monitor the mechanical stimulus and stress response. Using this equipment, experiments are conducted to investigate the influence of stretching parameters on the structure of polypropylene films, which provides an effective method to tailor the processing conditions to obtain the films with desired properties.
- Biaxial stretching,
- Processing/structure relationship,
- Dynamics of stretching
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