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Enhancement in Tensile Mechanical and Shape Recovery Properties of Polyurethane by Incorporating Graft‐polymerized Poly( tert ‐Butyl Acrylate) into Polyurethane
Author(s) -
Chung YongChan,
Park Eon Ho,
Choi Jae Won,
Chun Byoung Chul
Publication year - 2017
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.11247
Subject(s) - polyurethane , ultimate tensile strength , polymerization , materials science , grafting , acrylate , polymer chemistry , monomer , chemical engineering , composite material , polymer , engineering
The graft polymerization of tert ‐butyl acrylate ( TBA ) onto polyurethane ( PU ) was conducted to prepare a series of samples that was compared to a control series comprising a physical mixture of poly( TBA ) and PU . Maximum tensile stress sharply increased because of chemical cross‐linking via poly( TBA ), whereas tensile breaking strain slightly diminished by the grafted poly( TBA ). Percent shape recovery at 10°C rapidly increased by the additional grafting of poly( TBA ), whereas control series decreased with increases in TBA monomer content. Chemical cross‐linking from the grafted poly( TBA ) was responsible for the enhancement of shape recovery. Low‐temperature flexibility tests from −35°C demonstrated that a proper composition of grafted poly( TBA ) could enhance the flexibility of PU below 0°C. Overall, the grafted poly( TBA ) greatly stepped up the maximum tensile stress, recovery capability to original form, and flexibility of PU at very low temperature.