Albozahid, Muayad published the artcileEnhanced mechanical, crystallisation and thermal properties of graphene flake-filled polyurethane nanocomposites: the impact of thermal treatment on the resulting microphase-separated structure, Quality Control of 111-29-5, the publication is Journal of Polymer Research (2021), 28(8), 302, database is CAplus.
The present work investigates the combined effect of the addition of graphite nanoplatelets (xGNPs) to polyurethane copolymer (PUC) and thermal treatment was employed. The PUC reinforced by xGNP were synthesized by in-situ polymerization, which leads to an effective performance of the PUC/xGNP system. Meanwhile, X-ray diffraction and Raman spectroscopy tests displayed the inter-spacing planar quality of xGNP nanofillers. The thermal stability of PUC was seen to increase with addition of xGNP. Addnl., the dynamic storage modulus (E’) showed better performance after thermal treatment than in the untreated samples. However, a relationship between the microphase-separated morphol. of PUC induced by thermal treatment and the addition of xGNP has been observed Consequently, the crystallinity percentage increased after thermal treatment @ 80 C for 4 days, presuming a re-ordering of amorphous hard segments during the heating in a packed microphase conformation. On the other hand, better dispersion and interaction of xGNP can play a crucial role in enhancing the thermal and mech. properties, and thus a significant reinforcement for PUC. The tensile properties such as modulus and tensile strength showed significant enhancement with xGNP incorporation, while the elongation steeply dropped. On the contrary, a deterioration in modulus and tensile strength resulted from thermal treatment, likely due to the restacking of xGNP during segmental movement and thus increasing the amorphous phase rather than the crystalline phase. A modified Halpin-Tsai model was utilized to predict the mismatch between the empirical and theor. results. Consequently, the findings displayed the divergence of the nanocomposite modulus of PUC with greater amounts of xGNP nanofillers.
Journal of Polymer Research published new progress about 111-29-5. 111-29-5 belongs to alcohols-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ploymers, name is Pentane-1,5-diol, and the molecular formula is C5H12O2, Quality Control of 111-29-5.
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