Smith, Gregory N. published the artcileMolecular exchange in spherical diblock copolymer colloids synthesised by polymerization-induced self-assembly, Formula: C16H30O2, the main research area is lauryl methacrylate Me methacrylate diblock copolymer exchange diffusion micelle; Colloids; Molecular exchange; Polymer micelles; Polymerisation-induced self-assembly; Small-angle neutron scattering.
To study mol. exchange between colloids requires the preparation of suitably labeled species. Deuterium isotopic labeling has been used to prepare two chem. identical yet isotopically distinguishable poly(lauryl methacrylate)-poly(Me methacrylate) (PLMA-PMMA) diblock copolymer colloids by polymerization-induced self-assembly (PISA) directly in an alkane solvent. Mol. exchange should be detectable by performing small-angle neutron scattering (SANS) measurements on the dispersions. SANS measurements were performed on fully hydrogenous PLMA39-PMMA57 and deuterated core PLMA39-P(MMA-d8)57 colloids. They were mixed in equal amounts and heated to determine if mol. exchange occurred. PISA syntheses are often thermally initiated, and diblock copolymers self-assemble at elevated temperature, making this an important parameter to study. Exptl. data for the mixture were compared to predicted curves for exchanged and non-exchanged colloids. The scattering of a mixture of fully hydrogenous and deuterated core copolymers does not disappear upon mol. exchange, due to the remaining contrast between the stabilizer and the core and solvent even after the cores fully exchange. By simultaneously fitting the SANS data from dispersions before mixing and using these parameters to constrain fitting the SANS data of mixtures, the mol. exchange between diblock copolymer micelles upon heating is clearly observed
Journal of Colloid and Interface Science published new progress about Colloids. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Formula: C16H30O2.
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