Publications by authors named "Haneen Naji"
The current work investigates the effect of the addition of graphene nanoplatelets (GNPs) and graphene oxide (GO) to high hard-segment polyurethane (75% HS) on its thermal, morphological, and mechanical properties. Polyurethane (PU) and its nanocomposites were prepared with different ratios of GNP and GO (0.25, 0.
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- A series of thermoplastic polyurethanes (TPUs) with varying amounts of hard segments (HS) are synthesized and characterized using various analytical methods, focusing on their foamability and structural properties.
- The optimal foaming conditions for TPU with 50 wt.% HS are determined to be a saturation pressure of 25 MPa at a temperature of 170 °C for one hour, resulting in superior foam characteristics.
- The study concludes that only the TPU with 50 wt.% HS can be effectively foamed under the given conditions, producing foams with small cell sizes and specific porosity ranges.
Article Synopsis
- This study explores how the chemistry and concentration of thermoplastic polyurethane (TPU) impact the cellular structure of nanocellular polymers made from poly(methyl-methacrylate) (PMMA).
- Three grades of TPU with different levels of hard segments (60%, 70%, and 80%) were synthesized, and PMMA/TPU nanocellular polymers were created using a foaming process with varying TPU contents (0.5 wt%, 2 wt%, and 5 wt%).
- Results indicate that higher hard segment content and TPU concentration lead to increased density and nucleation density in the cellular structure, producing smaller cell sizes and a core density between 0.15 and 0.20, with cell sizes ranging from