New concept of reducing a birefringence of poly(ethylene naphthalate) by a novel alloy with fluorene-based polyester

Autor:	Kana Kobori, Yoshikazu Kondo, Hiroki Sakamoto, Kato Mariko, Shinichi Kawasaki, Toshikazu Takata
Rok vydání:	2009
Předmět:	Polarized light microscopy Materials science Birefringence Ethylene Polymers and Plastics Alloy General Chemistry Fluorene engineering.material Polyester chemistry.chemical_compound chemistry Materials Chemistry engineering Composite material Glass transition Tensile testing
Zdroj:	Polymer Engineering & Science. 49:2374-2383
ISSN:	1548-2634 0032-3888
Popis:	This study proposes the new concept of reducing the birefringence of poly(ethylene naphthalate) (PEN) by a novel alloy with fluorene-based polyester (FBP) involving the “cardo” structure in it. The alloys composed of PEN and FBP were prepared by simple melt blending method (process A) and reactive melt blending (process B). The resulting alloys were characterized by DSC, XRD, DMA, tensile testing, and polarized light microscopy. All PEN-FBP alloys showed transparency and a single glass transition temperature (Tg), indicating that PEN-FBP alloys were completely compatible. It was also demonstrated that Tg for PEN was shifted to the high-temperature side by alloying with FBP. A large amount of the orientation-induced birefringence was induced in drawn PEN sheets; however, in the cases of PEN-FBP alloys, it was drastically decreased because of alloying with FBP. We could reveal the new concept for “low-orientation-induced birefringence material.” POLYM. ENG. SCI., 2009. © 2009 Society of Plastics Engineers
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29f429ea9d854b1fd8a782db2943095e https://doi.org/10.1002/pen.21485 Zobrazit plný text záznamu Plný text