Ahmadi-khaneghah, Aziz; Salehi, Saeed; Behniafar, Hossein published the artcile< Polystyrene networks with polyoxyethylene cross-links covalently grafted onto nano-SiO2 cores: surface-initiated ATRP and thermal investigations>, SDS of cas: 1592-20-7, the main research area is polystyrene network polyoxyethylene crosslink silica ATRP.
Crosslinked polystyrene loaded by silica nanoparticles (CPS/SNPs) with hydrophilic nature was prepared via a solvent-free surface-initiated atom transfer radical polymerization technique. Chem. immobilization of the initiator of the polyaddition reactions was performed on silica nanoparticles. Also, polyoxyethylene chains capped with styrenic end units were synthesized from the reaction of 4-chloromethyl styrene and polyethylene glycol with mole ratios of 2:1 and then used as the chain crosslinker. In addition to CPS/SNPs composite, a crosslinked material lacking silica cores (CPS) was also prepared by a similar technique. Thermal stabilities of the resulting crosslinked polystyrenes were fully investigated by thermogravimetric anal./differential thermogravimetry. The silica-containing crosslinked material clearly showed more thermal stability than the bare material. In addition, both CPS/SNPs and CPS presented thermal stabilities nearly as much as other polystyrene-silica materials reported in the literature. Thus, the polyoxyethylene crosslinks did not cause addnl. thermal sensitivity in the network obtained. Furthermore, DTA measurements demonstrated that the phase transition caused by the thermal decomposition in CPS/SNPs composite is significantly reduced due to the presence of silica cores.
Polymer Bulletin (Heidelberg, Germany) published new progress about Atom transfer radical polymerization. 1592-20-7 belongs to class chlorides-buliding-blocks, and the molecular formula is C9H9Cl, SDS of cas: 1592-20-7.
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics