撕裂引發漣漪結構的形成

Fracture-induce Formation of Ripple Structure

林家弘(Chia-Hong Lin)

指導教授 ： 林清彬

淡江大學/工學院/機械與機電工程學系碩士班/碩士(2015年)

https://doi.org/10.6846/TKU.2015.00095

摘要

本研究藉由新穎的模組設計及撕裂引發漣漪結構之技術成功製作出漣漪結構，並提出撕裂引發漣漪結構形成的機制。另外，探討聚苯乙烯材質(聚苯乙烯/甲苯溶液、乳化聚合聚苯乙烯薄膜、聚苯乙烯塑膠粒熱壓成膜)，聚苯乙烯膜厚(3.7 um、2.2 um、1.1 um、0.8um)，不同拉伸速率(1mm/min、10 mm/min、20 mm/min)及不同拉伸應力軸角度差(45°、90°)對漣漪結構之型態及尺寸的影響。從實驗結果可知使用聚苯乙烯塑膠粒之方法可以得到大面積的漣漪結構，其漣漪波長會隨著聚苯乙烯膜厚減小而變小。以及漣漪的破裂面型態會隨著拉伸速率的增加而產生更不具規則的圖案。增加拉伸應力軸之角度差會使得漣漪條紋產生曲率上的變化。

關鍵字

撕裂引發結構 ； 漣漪結構 ； 聚苯乙烯

並列摘要

The present study has been successfully made ripple structures by the fracture-induce structure technology with innovative modular design and propose the formation mechanism of ripple structure. Furthermore, we studied the effect of polystyrene material (polystyrene / toluene solution with 45 kg mol-1 polystyrene, emulsion polymerization polystyrene film with 130 kg mol-1 polystyrene, polystyrene pellets with hot pressing filming with 45 kg mol-1 polystyrene), film thickness of polystyrene (3.7 um, 2.2 um, 1.1 um, 0.8um), different tensile rate (1mm / min, 10 mm / min, 20 mm / min) and different tensile stress axis angular difference (45°, 90°)on morphology and sizes of ripple structures. From the experimental results we can get three conclusions. First, we can a large area ripples structure by polystyrene pellets with hot pressing filming. Second, ripple wavelength decreased with the film thickness of polystyrene. It will produce a more non-regular pattern of the fracture surface with increased tensile rate. Final, we can see the effect of curvature of the ripples by different angles of the tensile stress axis.

並列關鍵字

Fracture-induce structure ； ripples structure ； polystyrene

參考文獻

[6]Guvendiren, M., Burdick, J. A., and Yang, S. “Kinetic study of swelling-induced surface pattern formation and ordering in hydrogel films with depth-wise crosslinking gradient.” Soft Matter. 6(9) (2010)pp2044-2049.

[7]SchaÈffer, E., Thurn-Albrecht, T., Russell, T. P., and Steiner, U. “Electrically induced structure formation and pattern transfer”. Nature. 403(6772) (2000) pp874-877.

[8]Lau, C. Y., and Russel, W. B. “Fundamental limitations on ordered electrohydrodynamic patterning.” Macromolecules. 44(19),(2011)pp7746-7751.

[9]Zhao, D., Martinez, A. D., Xi, X., Ma, X., Wu, N., and Cao, T. “Self‐Organization of Thin Polymer Films Guided by Electrostatic Charges on the Substrate.” Small. 7(16)(2011)pp 2326-2333.

[10]Yang, F., and Song, W. “Morphological instability of elastic thin films–effect of electromechanical interaction.” Applied Physics Letters. 87(11)(2005)pp111912.