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Leyao ("Luffy") Wu

Fall 2019: Ph.D. in Polymer Engineering

2019: M.S. in Polymer Engineering | The University of Akron

2017: B.S. in Material Chemistry | South China University of Technology

Research Interests: Investigation of material systems to reduce the warpage observed in 3D-printed semi-crystalline parts from recycled high-density polyethylene

Email: lw103 [@] uarkon [.] edu

Papers in Group

Crystallinity of Recycled PET Fibers from Chemical and Mechanical ReprocessingABSTRACT. This work investigated the effect of isophthalate (iso) content in poly(ethylene terephthalate) (PET) materials on its degree of crystallinity (χ%) and mechanical properties. Melt blends were prepared from virgin (0 iso-wt.%) and bottle-grade (1.7 iso-wt.%) PET and subsequently spun into fibers. The mechanical and crystallinity properties were determined using differential scanning calorimetry (DSC), X-ray diffraction (XRD), and uniaxial tensile testing. The crystallinity results determined from DSC and XRD quantified the relationship between iso-content and χ% in the materials. It was found that melt-mixing of different isophthalate grades had a lesser effect on melting temperature (Tm) and χ% than chemically recycled random copolymers of terephthalate and isophthalate. It was further shown that random copolymers of <0.25 iso-wt.% had comparable crystallinity to the virgin high-modulus low-shrink (HMLS) materials.

Effect of PET support membrane thickness on water permeation behavior of thermally responsive PNIPAM-g-PET membranesA KrF excimer laser was used at 248 nm wavelength to fabricate support membranes and the final PNIPAM pore-filled thermally responsive PET membranes o…

Mechanochemically accessing a challenging-to-synthesize depolymerizable polymer - Nature CommunicationsPolymers with low ceiling temperatures (Tc) are highly desirable as they can depolymerize under mild conditions, but they typically suffer from demanding synthetic conditions and poor stability. Here, the authors envision that this challenge can be addressed by developing high-Tc polymers that can be converted into low-Tc polymers on demand.

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