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Rheokinetics of graft copolymerization of acrylamide in concentrated starch and rheological behaviors and microstructures of reaction products
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Bao, Xianyang, Yu, Long, Simon, George P., Shen, Shirley, Xie, Fengwei, Liu, Hongsheng, Chen, Ling and Zhong, Lei (2018) Rheokinetics of graft copolymerization of acrylamide in concentrated starch and rheological behaviors and microstructures of reaction products. Carbohydrate Polymers, 192 . pp. 1-9. doi:10.1016/j.carbpol.2018.03.040 ISSN 1879-1344.
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Official URL: http://doi.org/10.1016/j.carbpol.2018.03.040
Abstract
A widely recognized challenge in starch chemistry is to manipulate the graft copolymerization onto starch melt by reactive extrusion (REX). To understand the complex in-situ graft copolymerization in highly concentrated systems, we firstly used a mixer to achieve a homogeneous viscous starch melt, and then undertook dynamic rheological measurements to study the rheokinetics of the reaction. The in-situ synthesis also facilitated the characterization of the microstructures of reaction products. The melt mixture could be regarded to be completely micromixed since the rheokinetics was predominated by the reaction kinetics. The rheological characterization revealed that G'of hydrogels followed a linear progression with the crosslinker concentration. Nevertheless, the reaction temperature and initiator content had little influence on the final microstructure of hydrogels, most likely due to the strong chain transfer reaction in the melt. Additionally, high-amylose starches tended to form grafted hydrogels with a high physical crosslinking density.
| Item Type: | Journal Article | |||||||||||||||||||||||||||
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| Subjects: | Q Science > QD Chemistry | |||||||||||||||||||||||||||
| Divisions: | Other > Institute of Advanced Study | |||||||||||||||||||||||||||
| SWORD Depositor: | Library Publications Router | |||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Acrylamide, Rheology, Colloids, Copolymers, Starch, Carbohydrates | |||||||||||||||||||||||||||
| Journal or Publication Title: | Carbohydrate Polymers | |||||||||||||||||||||||||||
| Publisher: | Pergamon Press | |||||||||||||||||||||||||||
| ISSN: | 1879-1344 | |||||||||||||||||||||||||||
| Official Date: | 15 July 2018 | |||||||||||||||||||||||||||
| Dates: |
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| Volume: | 192 | |||||||||||||||||||||||||||
| Page Range: | pp. 1-9 | |||||||||||||||||||||||||||
| DOI: | 10.1016/j.carbpol.2018.03.040 | |||||||||||||||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||||||||||||||
| Publication Status: | Published | |||||||||||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||||||||||||||
| Date of first compliant deposit: | 6 June 2018 | |||||||||||||||||||||||||||
| Date of first compliant Open Access: | 15 March 2019 | |||||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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