Sanchez-Calderon, Ismael; Bernardo, Victoria; Santiago-Calvo, Mercedes; Naji, Haneen; Saiani, Alberto; Rodriguez-Perez, Miguel Angel published an article in 2021, the title of the article was Effect of the Molecular Structure of TPU on the Cellular Structure of Nanocellular Polymers Based on PMMA/TPU Blends.Category: alcohols-buliding-blocks And the article contains the following content:
In this work, the effects of thermoplastic polyurethane (TPU) chem. and concentration on the cellular structure of nanocellular polymers based on poly(methyl-methacrylate) (PMMA) are presented. Three grades of TPU with different fractions of hard segments (HS) (60%, 70%, and 80%) were synthesized by the prepolymer method. Nanocellular polymers based on PMMA were produced by gas dissolution foaming using TPU as a nucleating agent in different contents (0.5 wt%, 2 wt%, and 5 wt%). TPU characterization shows that as the content of HS increases, the d., hardness, and mol. weight of the TPU are higher. PMMA/TPU cellular materials show a gradient cell size distribution from the edge of the sample toward the nanocellular core. In the core region, the addition of TPU has a strong nucleating effect in PMMA. Core structure depends on the HS content and the TPU content. As the HS or TPU content increases, the cell nucleation d. increases, and the cell size is reduced. Then, the use of TPUs with different characteristics allows controlling the cellular structure. Nanocellular polymers have been obtained with a core relative d. between 0.15 and 0.20 and cell sizes between 220 and 640 nm. The experimental process involved the reaction of Pentane-1,5-diol(cas: 111-29-5).Category: alcohols-buliding-blocks
The Article related to mol structure nanocellular pmma tpu blend, gas dissolution foaming, nanocellular polymer, poly(methyl-methacrylate), thermoplastic polyurethane, Plastics Fabrication and Uses: Plastic Product Uses and other aspects.Category: alcohols-buliding-blocks
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