Free radical degradation of hydroxyethyl cellulose
(2005) In Carbohydrate Polymers 62(4). p.344-356- Abstract
- The degradation of hydroxyethyl cellulose (HEC) using sodium persulfate (NaPS) as free radical generator was studied at 60, 70 and 80 degrees C with different NaPS/HEC ratios. During the degradation reaction samples were withdrawn at regular intervals. The amount of persulfate remaining was analyzed by titration and the evolution of the HEC molecular weight distribution and viscosity was followed using size exclusion chromatography (SEC) and rheology, respectively. The results show how the molecular weight of HEC is decreased by varying the NaPS/HEC ratio, reaction time and temperature. It was found that the NaPS/HEC ratio must be kept low in order to maintain the control of the degradation process, since when the NaPS/HEC ratio was too... (More)
- The degradation of hydroxyethyl cellulose (HEC) using sodium persulfate (NaPS) as free radical generator was studied at 60, 70 and 80 degrees C with different NaPS/HEC ratios. During the degradation reaction samples were withdrawn at regular intervals. The amount of persulfate remaining was analyzed by titration and the evolution of the HEC molecular weight distribution and viscosity was followed using size exclusion chromatography (SEC) and rheology, respectively. The results show how the molecular weight of HEC is decreased by varying the NaPS/HEC ratio, reaction time and temperature. It was found that the NaPS/HEC ratio must be kept low in order to maintain the control of the degradation process, since when the NaPS/HEC ratio was too high the degradation rate of HEC was too fast, and the molecular weight distribution became bimodal. Additionally, the decomposition rate of NaPS was found to be independent of pH in the range between pH 2 and 7. (c) 2005 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/157380
- author
- Erkselius, Stefan LU and Karlsson, Ola LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Carbohydrate Polymers
- volume
- 62
- issue
- 4
- pages
- 344 - 356
- publisher
- Elsevier
- external identifiers
-
- wos:000234244000007
- scopus:28544435117
- ISSN
- 0144-8617
- DOI
- 10.1016/j.carbpol.2005.08.013
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041), Physical Chemistry 1 (S) (011001006)
- id
- 5058db8c-b181-445b-ad66-77ddddcbd1d4 (old id 157380)
- date added to LUP
- 2016-04-01 12:16:47
- date last changed
- 2022-04-05 20:16:56
@article{5058db8c-b181-445b-ad66-77ddddcbd1d4, abstract = {{The degradation of hydroxyethyl cellulose (HEC) using sodium persulfate (NaPS) as free radical generator was studied at 60, 70 and 80 degrees C with different NaPS/HEC ratios. During the degradation reaction samples were withdrawn at regular intervals. The amount of persulfate remaining was analyzed by titration and the evolution of the HEC molecular weight distribution and viscosity was followed using size exclusion chromatography (SEC) and rheology, respectively. The results show how the molecular weight of HEC is decreased by varying the NaPS/HEC ratio, reaction time and temperature. It was found that the NaPS/HEC ratio must be kept low in order to maintain the control of the degradation process, since when the NaPS/HEC ratio was too high the degradation rate of HEC was too fast, and the molecular weight distribution became bimodal. Additionally, the decomposition rate of NaPS was found to be independent of pH in the range between pH 2 and 7. (c) 2005 Elsevier Ltd. All rights reserved.}}, author = {{Erkselius, Stefan and Karlsson, Ola}}, issn = {{0144-8617}}, language = {{eng}}, number = {{4}}, pages = {{344--356}}, publisher = {{Elsevier}}, series = {{Carbohydrate Polymers}}, title = {{Free radical degradation of hydroxyethyl cellulose}}, url = {{http://dx.doi.org/10.1016/j.carbpol.2005.08.013}}, doi = {{10.1016/j.carbpol.2005.08.013}}, volume = {{62}}, year = {{2005}}, }