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The degradation mechanisms of two different polymers were studied using multi-detector GPC and capillary rheology. While polystyrene was observed to degrade through polymer chain scision, PMMA was seen to aggregate through cross-linking.

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Static light scattering can be used to measure the molecular weight of macromolecules such as proteins and polysaccharides, as well as their virial coefficients to determine intermolecular interactions. This application note details molecular weight measurements performed on various proteins, polymers and polysaccharides on the Zetasizer Nano. Data from Polystyrene [10kDa, 100kDa, 980kDa] in toluene and dextrane [63kDa] in water are shown as representative examples.

Products:
Zetasizer Nano range
Date:
September 22 2006
Language:
English
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In this note we analyze two hyperbranched polyesters samples by advanced size exclusion chromatography to assess the branching. We show that even for low dn/dc samples of hyperbranched polyesters the results are reproducible

Products:
Viscotek range
Date:
September 30 2009
Language:
English
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To control the performance of Polyvinyl alcohol, it is important to monitor the molecular weight and intrinsic viscosity. The FIPA method provides simultaneous user friendly measurements that are robust in a plant/process control environment

Products:
Viscotek range
Date:
September 30 2009
Language:
English
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Processing of natural polymers can affect their molecular weight, distribution, size, and conformation. The triple detector enables changes in molecular structure and molecular chain length to be simultaneously and independently monitored

Products:
Viscotek range
Date:
September 30 2009
Language:
English
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