Deformation mechanism of semicrystalline polymers under high strains probed by in situ spectroscopic techniques

2016 Fiscal Year Final Research Report

• Project/Area Number: 26410221
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Polymer/Textile materials
• Research Institution: Kanazawa University
• Principal Investigator: Hiejima Yusuke 金沢大学, 自然システム学系, 助教 (10415789)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 高分子材料物性 / ポリオレフィン / 延伸 / 結晶化 / 配向 / ラマン分光

Outline of Final Research Achievements

In situ Raman apparatus was developed to observe the microscopic deformation and melting/crystallization behavior of semi-crystalline polymers such as polyethylene and polypropylene. During the uniaxial stretching of these semi-crystalline polymeric solids, it was found that the molecular chains orient toward a direction tilt from the stretching axis in the yielding region, and that compression stress was applied perpendicular to the polymer chains. These peculiar deformation suggests that the rotational motions of the lamellar cluster units which is formed by the collapse of the spherulites are the origin of the orientation after the yielding.

Free Research Field

分光計測