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Mechanical properties of polymeric biomaterials: Modified ePTFE using gamma irradiation by Mohd Radzali, Nur Ain (author);Mohd Hidzir, Norsyahidah (author);Abdul Rahman, Irman (author);Mokhtar, Abdul Khaliq (author) is a Chemistry article available to read on EtoBox.

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Abstract Evaluating the mechanical properties of expanded polytetrafluoroethylene (ePTFE) is essential to measure its resistance to permanent deformation from an applied force. These mechanical ePTFE properties must be comparable to the properties of real tissue. Various hydrophilic comonomers 2-hydroxyethyl methacrylate (HEMA), N-isopropylacrylamide (NIPAAM), and N-vinylcaprolactam were used individually for copolymerization with acrylic acid (AA) to be grafted onto ePTFE using the gamma irradiation-induced grafting method. After surface modification, the hydrophobic and mechanical properties of ePTFE were altered. The water uptake and contact angle measurement showed that the modified ePTFE was less hydrophobic (∼500%, θ < 90°) than the unmodified ePTFE (0%, θ = 140°). Moreover, the mechanical properties of ePTFE changed after the modification process due to the polymer grafted onto the ePTFE surface. The data from mechanical tests, such as Young’s modulus (74–121 MPa), ultimate tensile strength (5–9 MPa), and elongation at break (56–121%), obtained for the sample AA-co-HEMA and AA-co-NIPAAM remain within the ranges and are considered desirable for use as a biomaterial. The mecha

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Author

Mohd Radzali, Nur Ain (author);Mohd Hidzir, Norsyahidah (author);Abdul Rahman, Irman (author);Mokhtar, Abdul Khaliq (author)

Publisher

Walter de Gruyter GmbH

Published

2021

Language

EN

Field

Chemistry (Physical Sciences)