Infrared Reflection Absorption Spectroscopy (IRRAS) and optical microscopy were used in this study to follow the crust formation during the polymerization process in order to propose a mechanism for the formation of scale.doi:10.1080/03602559.2012.676137JulienHuser...
polybmerizationmechanismandcurrent grades ofPVA dispersant in vinyl chloride suspensionpolymerization. KeyWords:Polyvinylalcohol(PVA)Dispersantvinyl Chloride SuspensionPolymerization 主要参考文献 [1】邴娟林,黄志明等.聚氯乙烯工艺技术【M】.化学-mll,出版社,2009.[2]矫丽杰,郝江.国产分 ...
Thus, understanding the underlying mechanism by which PVA confers IRI activity is key for the development, refining and optimisation of the next-generation cryoprotectants that can be fine-tuned for a diverse range of applications (e.g. regenerative medicine, food storage and crop security1). ...
It is important to note that the performance of PVA and starch can vary significantly depending on the degree of polymerization and alcoholysis of the PVA, as well as the type of starch used. These factors can influence the mechanical properties, barrier performance, and overall functionality of ...
The plasticizing mechanism and the effects of GL/PILs system on PVA polymers were further investigated. Cation (OH), anion (Cl−) and hydrogen bond acceptors in the GL/PILs plasticizing system could form strong hydrogen bonds with the hydroxyl groups of PVA. Compared with pure PVA, the ...
Dip catalysts, in which the catalytic species are immobilized on solid planar supports, have drawn increasing attention due to their ease of fabrication, e
1, composite films were prepared by in situ polymerization of PANI on the surface of PVA/CNT films. Firstly, a 10-ml aqueous solution including 500 mg PVA was prepared, and 50 mg CNTs were added successively. After heating to 95 °C for 30 min, the mixture was poured into a...
The surface activity performance of AA PVA was evaluated, and the relationship between the pMDI dispersion property in the PVA aqueous solution and the ability to consume isocyanate (NCO) groups was examined in comparison with ordinary PVA, which was used with varying degrees of polymerization and ...
Therefore, the impact of freeze-thawing, anneal-swelling on the microstructures and physical properties of hydrogels was investigated, and toughening mechanism of physical-chemical PVA/PAM DN gels was demonstrated based on mechanisms for dissipating mechanical energy and maintaining high elasticity. The ...
In this study, we grafted brush-like CBMA copolymer brushes onto the surface of PVA hydrogel membrane through photo-induced electron transfer–reversible addition fragmentation chain transfer (PET-RAFT) polymerization. ATR-FTIR, XPS, AFM, UV–Vis absorption spectra and elemental analysis were adopted ...