Characterization of Polyurethane Grafted with Bis(2-hydroxyethyl) Terephthalate. Issue 14 (22nd September 2018)

• Record Type: Journal Article
• Authors: Chung, Yong-Chan; Kim, Sang Hyeon; Choi, Jae Won; Chun, Byoung Chul
• Is Part Of: Polymer-plastics technology and engineering. Volume 57:Issue 14(2018)
• Page Start: 1474
• Page End: 1484
• Publication Date: 2018-09-22
• Subjects: Cross-linking -- grafting -- polyurethane -- shape memory; Polymers -- Periodicals; Polymerization -- Periodicals; Polymers -- Periodicals; Engineering -- Periodicals; Plastics -- Periodicals; 668.9
• DOI: 10.1080/03602559.2017.1410835
• Languages: English
• ISSNs: 0360-2559

Abstract

ABSTRACT: Bis(2-hydroxyethyl) terephthalate (BHETPA) was grafted onto polyurethane (PU) to investigate the effects of BHETPA, which contains a rigid aromatic group and flexible hydroxyethyl groups, on the physical properties of PU. The cross-link density, viscosity, tensile strength, and shape recovery notably increased with an increase of BHETPA due to chemical cross-linking by BHETPA. A PU sample demonstrated excellent low-temperature flexibility compared with plain PU, showing complete recovery at approximately 0°C. Therefore, grafting BHETPA onto PU modified the thermal behavior and greatly improved the tensile stress, shape recovery, and low-temperature flexibility of PU compared to plain PU. GRAPHICAL ABSTRACT: