When Is a Force Not a Force?

Patterson, Andrew H.

doi:10.1126/science.45.1159.259

Cited by 8 publications

(2 citation statements)

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“…Halpin‐Tsai model for CNT filled nanocomposites was used to describe the elastic modulus of APUA/CNT‐HEMA. The model for fully aligned short fiber is expressed as follows :

\frac{E_{c}}{E_{m}} = \frac{1 + η ξ φ}{1 - η φ},

where

η = \frac{\frac{E_{f}}{E_{m}} - 1}{\frac{E_{f}}{E_{m}} + ξ}

, E m and E f are the elastic modulus of matrix and fiber, respectively, and E c is the modulus of composite either in longitudinal ( E L ) or transverse ( E T ) directions.

ξ

is a parameter that is dependent on the filler orientation, i.e.,

ξ_{T}

= 2 for transvers direction and

ξ_{L}

= 2 λ for longitudinal direction.…”

Section: Resultsmentioning

confidence: 99%

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In situ preparation and characterization of biocompatible acrylate‐terminated polyurethane containing chemically modified multiwalled carbon nanotube

Alishiri

Shojaei

2017

Polymer Composites

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Biodegradable acrylate‐terminated polyurethane/acrylate (APUA) filled with 2‐hydroxyethyl methacrylate functionalized carbon nanotube (CNT‐HEMA) was prepared by in situ free radical crosslinking. CNT‐HEMA enhanced crystallinity of soft domain and caused more phase separation between hard and soft domains of APUA. Tensile testing showed a considerable improvement in elastic modulus (∼160%) and tensile strength (∼30%) at 1 wt% loading. Morphological features of APUA induced by nanotubes were found to be dominant on mechanical properties of APUA/CNT‐HEMA. CNT‐HEMA increased water contact angle of APUA; however, wettability of APUA/CNT‐HEMA maintained in acceptable range for biomedical applications. APUA/CNT‐HEMA exhibited lower hydrophobic nature compared to many CNT filled polyurethanes reported in literature due to HEMA functional group, making APUA/CNT‐HEMA nanocomposites adequate for biomedical applications. POLYM. COMPOS., 39:E297–E307, 2018. © 2017 Society of Plastics Engineers

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“…Halpin‐Tsai model for CNT filled nanocomposites was used to describe the elastic modulus of APUA/CNT‐HEMA. The model for fully aligned short fiber is expressed as follows :

\frac{E_{c}}{E_{m}} = \frac{1 + η ξ φ}{1 - η φ},

where

η = \frac{\frac{E_{f}}{E_{m}} - 1}{\frac{E_{f}}{E_{m}} + ξ}

, E m and E f are the elastic modulus of matrix and fiber, respectively, and E c is the modulus of composite either in longitudinal ( E L ) or transverse ( E T ) directions.

ξ

is a parameter that is dependent on the filler orientation, i.e.,

ξ_{T}

= 2 for transvers direction and

ξ_{L}

= 2 λ for longitudinal direction.…”

Section: Resultsmentioning

confidence: 99%

“…Halpin-Tsai model for CNT filled nanocomposites was used to describe the elastic modulus of APUA/CNT-HEMA. The model for fully aligned short fiber is expressed as follows [60]:…”

Section: Modeling Approaches To Analyze the Reinforcing Mechanisms Ofmentioning

confidence: 99%