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The non-isothermal equation was extended to describe non-isothermal cold crystallization kinetics of oriented polymers. The validity of the equation was examined by using a DSC crystallization curve of oriented poly(ethylene terephthalate) (PET) fibers with a constant heating rate. The double cold crystallization peaks appeared in the DSC curve. The relative degrees of crystallinity at different temperatures...
Acrylic thermosetting latexes were synthesized using methyl methacrylate (MMA) and butyl acrylate (BA) with methacrylic acid (MAA) or 2-hydroxyethyl methacrylate (HEMA). The MAA or HEMA was incorporated to provide the latexes with carboxyl or hydroxyl functionality, respectively. A cycloaliphatic diepoxide (3,4-epoxycyclohexyl methyl-3',4'-epoxycyclohexane carboxylate) was used to crosslink with hydroxyl...
Two model acrylic latex systems were synthesized. One latex system was carboxyl functional, and prepared using methyl methacrylate (MMA) and butyl acrylate (BA) with methacrylic acid (MAA). The second latex system was hydroxyl functional, and prepared using MMA and BA with 2-hydroxyethyl methacrylate (HEMA). Both the resultant latexes were crosslinked with a cycloaliphatic diepoxide (3,4-epoxycyclohexyl...
Separation of polyvinylpyrrolidone, a water-soluble polymer of neutral charge, by high osmotic pressure chromatography (HOPC) is presented. HOPC, suitable for preparative separation of polymer by molecular weight, has been applied to various organic-soluble polymers. We demonstrate here that HOPC can also separate water-soluble polymers and is capable of separating fractions of narrower polydispersity...
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