第36回 グリーンマテリアル成形加工研究センター セミナーについて −36th GreenMAP Seminar

第36回 グリーンマテリアル成形加工研究センターの講演会を次世代自動車用プラスチック素材加工研究センター,有機材料システム研究機構で開催します。
Texax A&M University Prof. H-J. Sueの講演会を下記のとおり開催いたしますので、お誘い合わせのうえご出席下さいますようご案内申し上げます。

Lecturer：Prof H-J Sue（Polymer Technology Center, Taxas A&M University）

Title：Tensile True Stress-Strain Curve and Essential Work of Fracture Characterization of LLDPE Blown Films 

Date and Time： Tue, Jun 23, 10：30-12:00

Place：Seminar Room, GMAP Center

Abstract:
Characterization of tensile true stress-strain curves and fracture toughness of ductile polymeric thin films is nontrivial. It requires extreme care in sample preparation to avoid premature film damage, in fixture design to minimize out of plane film wrinkling, and in the analysis of their deformation and corresponding energy partitioning to establish meaningful structure-property relationship. In this presentation, the tensile true stress-strain curves of a series of LLDPE blown films were generated to allow for quantitative energy partitioning at each deformation zone in situ as defined by the essential work of fracture (EWF) approach. The EWF approach is found to be highly effective in differentiation of film performance of varying film densities and upon change in their processing conditions, i.e., blow-up ratio, film gage, orientation, and froze-line height. Furthermore, in situ and post-mortem plastic zone analysis of the EWF tested films using digital imaging correlation (DIC) enable our determination of partitioned EWF energy terms with corresponding size and shape of the plastic zone and for correlation with films’ structural parameters. Implication of the present study for design of high performance LLDPE films is discussed. 

主催：山形大学有機材料システム研究機構
山形大学グリーンマテリアル成形加工研究センター
次世代自動車用プラスチック素材加工研究センター 

担当：有機デバイス工学専攻＆機能高分子工学専攻 伊藤浩志（内線3081）