학술논문
Contrasting thermal behavior and low-temperature flexibility of PDMS-grafted and poly(2-ethylhexyl acrylate)-grafted polyurethane.
Document Type
Article
Source
Subject
*POLYDIMETHYLSILOXANE
*LOW temperatures
*POLYACRYLATES
*POLYURETHANES
*THERMAL analysis
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Language
ISSN
1060-1325
Abstract
Polydimethylsiloxane (PDMS) was grafted onto polyurethane (PU) to form a P series, and 2-ethylhexyl acrylate (EHA) was graft-polymerized onto PU to form an E series. The spectroscopic, thermal, tensile, shape memory, and low-temperature flexibility properties of the P and E series were compared. With an increase in the PDMS content, the Tgof the P series gradually increased, whereas the Tgof the E series was not affected by an increase in the EHA content. The tensile strength of the P and E series sharply increased with the PDMS or EHA content without a significant decrease in tensile strain. The shape recovery of the P and E series remained high after four repeated tests. However, shape retention of the P series significantly decreased with an increase in the PDMS content. Finally, the P series demonstrated excellent low-temperature flexibility from −35°C compared with the E series and control PUs. [ABSTRACT FROM AUTHOR]