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Effect of poly(methyl methacrylate) molecular weight on its ternary polymer blends micro– structure using x–ray computed tomography

A high–contrast X–ray computed tomography (XCT) applied to the ternary polymer blends of poly(methyl methacrylate) (PMMA), polypropylene (PP) and polyamide 12 (PA12), we investigated micro–structure three–dimensional (3D) images of blends with gradually increasing of molecular weight (Mw) of PMMA. | Journal of Science and Technology 55 (1B) (2017) 169–173 EFFECT OF POLY(METHYL METHACRYLATE) MOLECULAR WEIGHT ON ITS TERNARY POLYMER BLENDS MICRO– STRUCTURE USING X–RAY COMPUTED TOMOGRAPHY Hoa T. Nguyen1, 2, *, Yukihiro Nishikawa3 1 Faculty of Materials Technology, HCMUT–VNUHCM 268 Ly Thuong Kiet Street, Ward 14, District 10, Ho Chi Minh City, Vietnam 2 Key Laboratory of Materials Technology, HCMUT–VNUHCM 268 Ly Thuong Kiet Street, Ward 14, District 10, Ho Chi Minh City, Vietnam 3 Department of Macromolecular Science & Engineering, Kyoto Institute of Technology Matsugasaki, Sakyo–ku, Kyoto 606–8585, Japan * Email: nthhoa@hcmut.edu.vn Received: 30 December 2016; Accepted for publication: 3 March 2017 ABSTRACT A high–contrast X–ray computed tomography (XCT) applied to the ternary polymer blends of poly(methyl methacrylate) (PMMA), polypropylene (PP) and polyamide 12 (PA12), we investigated micro–structure three–dimensional (3D) images of blends with gradually increasing of molecular weight (Mw) of PMMA. The 1:1:1 mixture of PMMA/PP/PA12 were prepared by mixing on an internal mixer at 200 °C, then annealing at 200 °C under compressor of 5 MPa in order to restore the crystalline structure of polymer blends. After that, blends were compressed molding and cooled by water. Finally, they were stored in the vacuum oven at the same annealing temperature before taking XCT and then rendering to 3D images. Changing various methods of annealing time, we could observe vary 3D internal structure clearly of these blends. We also conclude the effect between Mw of PMMA and the morphologies of these ternary polymer blends. Keywords: X–ray computed tomography, three–dimensional micro–structure image, ternary polymer blends. 1. INTRODUCTION X–ray computed tomography is known as a CT scan, and it is widely used in medicine to reveal internal hard tissue structures. The same technique can be used to reveal the internal three–dimensional structure and component distribution within .