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- W1994579080 abstract "Abstract Terminal and penultimate models for controlling copolymer composition distribution (CCD) in ethylene and norbornene (NB) copolymerization were developed by taking into account the variation of active site concentration with the initial comonomer ratio. The models were validated by batch polymerization experimental data. The terminal model gave better correlation with the composition data whereas the penultimate model had a better fit to the rate data. The terminal model was then used to design NB feeding policies in semicontinuous processes for targeted CCD profiles. Based on the model results, a series of ethylene‐NB copolymers with various NB contents were prepared. With the same NB content, the semicontinuous process produced a uniform composition, whereas the batch process yielded broad CCD. The batch samples had lower T g values and broader transition ranges, even yielded crystalline materials. In contrast, the semicontinuous samples overcame the disadvantages. © 2009 American Institute of Chemical Engineers AIChE J, 2009" @default.
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- W1994579080 date "2009-01-22" @default.
- W1994579080 modified "2023-10-18" @default.
- W1994579080 title "Model development for semicontinuous production of ethylene and norbornene copolymers having uniform composition" @default.
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- W1994579080 doi "https://doi.org/10.1002/aic.11714" @default.
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