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| Study of the Dissolution of Polyethylene Oxide with a High Molecular Weight in Water |
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| DOI：10.11980/j.issn.0254-508X.2016.12.005 |
| Key Words:polyethylene oxide dissolution rate rotary viscometer dissolution kinetics |
| Fund Project:本课题得到了上海市普陀区科技创新项目研发人才专项（2014-Q002A）的资助。 |
| Author Name | Affiliation | | 孔 猛1,2,3 | 1.聚烯烃催化技术与高性能材料国家重点实验室，上海,200062；2.上海化工研究院，上海,200062；3.上海市聚烯烃催化技术重点实验室，上海,200062 | | 康必显1,2,3 | 1.聚烯烃催化技术与高性能材料国家重点实验室，上海,200062；2.上海化工研究院，上海,200062；3.上海市聚烯烃催化技术重点实验室，上海,200062 | | 罗 勇1,2,3，* | 1.聚烯烃催化技术与高性能材料国家重点实验室，上海,200062；2.上海化工研究院，上海,200062；3.上海市聚烯烃催化技术重点实验室，上海,200062 |
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| Abstract:As a kind of nonionic and water dissoluble polymer, polyethylene oxide (abr. as PEO) with a high molecular weight plays an important role in papermaking. In this paper, a rotary viscometer was employed to investigate the factors which affect the dissolution rate of PEO in water. It was uncovered that the dispersion of PEO in H2O and the diffusion of H2O in PEO particles affect the dissolution rate of PEO obviously. However, the crystalline degree of PEO affects slightly. Although PEO particles with a big size can disperse well in water, H2O molecules cannot permeate easily, as a consequence, it dissolves slowly. In contrast, PEO particles with a small size, H2O can go into particles and swell PEO easily. Comparatively, PEO with a particle size of 40~60 mesh dissolves fast. PEO solution is stable in a basic environment rather than in acid environment, because H+ promotes degradation of PEO. DSC results display that PEO is a partial crystallized polymer, and the dissolution rate of PEO changes less when the crystallinity at a range of 50%~58%. Moreover, dissolution kinetics of PEO shows the dissolution of PEO is a zero-order process, suggesting the dissolution of PEO in water is crucial, and the apparent dissolution activation energy is calculated as 5.2 kJ/mol． |
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