Polyvinyl chloride coating with viscous cellulose

Document Type : Research Paper

Authors

1 STUDENT

2 Professor

3 Assistance Professor Of Department of Chemistry, Payame Noor University, P. OBox, 19395-4697, Tehran, Iran

Abstract

The first purpose of this study is to investigate different methods of making viscous cellulose (in non-aqueous solvent) and strengthening tissue by cross-linking synthesis. The second goal is coupling with PVC. To coat viscovellulose on polyvinylchloride (PVC) surface in this study, instead of water, organic solvents as ethylenediamine and ethylene glycol were used to synthesize viscous cellulose. In the first method, gelatinization of cellulose was performed in ethylene glycol solvent and cellulose tissue was reinforced with ester ‎crosslink by additives such as phthalic ‎anhydride and polyvinyl alcohol. In the second method, cellulose was aminolyzed in ethylenediamine and an amide cross-link was formed by using terephthalic acid. In the third ‎method, cellulose ‎acetate tissue was reinforced with polyvinyl acetate and borax. Finally; it was rubberized with acetone solvent. In the final step, the viscose cellulose samples of each method were coated with a layer of PVC paste. To ‎compare the quality of coupling methods, the tensile test and moisture absorption test were used. Based on the obtained results, the first (ester crosslink) and second method (amide crosslink) had better tensile strength (with tensile device) and moisture absorption (with volatile meter) was more than the others. The tensile strength of the first method and its moisture absorption was more than other methods. Also, intrinsic viscosity [η] of viscocellulose: PVC paste (1:1ratio) showed that the third method ‎‎(cellulose acetate and polyvinyl acetate paste) has the highest homogeneity and adhesion ‎with PVC paste.  The advantage of these methods is that for the synthesis of viscous ‎cellulose, ethylene glycol solvent is used instead of water solvent and for activation energy, ‎a microwave beam is used instead of heater heat. The importance of microwave beams for this ‎research method is proved by the DSC method. ‎

Keywords

References

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Iranian Journal of Wood and Paper Industries
Volume 12, Issue 3
December 2021
Pages 323-336

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