18299-85-9Relevant academic research and scientific papers
Surface segregation in polymer blends driven by surface freezing
Prasad, Shishir,Hanne, Laurie,Dhinojwala, All
, p. 7467 - 7470 (2006)
The surface freezing-driven surface segregation in polymer blends was investigated by determining the surface composition and surface temperatures in binary mixtures containing two different lengths of side chains. The chemical attachment of alkyl chains to the backbone was found to lead to considerable differences from the surface freezing in binary alkane mixtures. The surface transition and composition were measured using surface-sensitive infrared-visible sum frequency generation (SFG) spectroscopy and surface tension. The SFG spectra at various blend concentrations were measured as a function of temperature to determine the orientation and concentration of the ordered chains on the surface. The results show that the surface segregation of V22 is sufficient to cover the surface with C22 below Ts22.
Preparation process of long-chain alkyl (meth) acrylate
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Paragraph 0057; 0058, (2021/01/12)
The invention discloses a preparation process of long-chain alkyl (meth) acrylate, which adopts a polymerization inhibitor composition containing phenothiazine accounting for at least 10% of the totalmass of the composition as a polymerization inhibitor for esterification reaction. The invention solves the problem of self-polymerization in the post-treatment process, can effectively control the acidity of the product to obtain a colorless or white high-purity product, and has the advantages of high yield and expanded application range of the product; in addition, according to the preparationprocess, polymerized excessive (methyl) acrylic acid is recycled, so that a large amount of acid wastewater is prevented from being generated, and the comprehensive benefit is increased.
