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Molecular Weight (Mn) and Functionality Effects on CUP Formation and Stability

Michael R. Van De Mark, Ameya M. Natu, Sagar V. Gade, Minghang Chen, Catherine Hancock, Cynthia Riddles


The formation of colloidal unimolecular polymer, CUP, particles from single polymer strands was investigated as a function of molecular weight. The CUP particle size was correlated with the absolute molecular weight and its distribution. The characteristics of the particles were evaluated with respect to viscosity, acid number, size distribution and stability. The particle size varied from less than three nanometers to above eight nanometers representing polymers with molecular weight in the range of 2,000 to 153,000. Lower molecular weight polymers were found to be unstable.

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