| Preparation of Natural Rubber by Inverse Flocculation |
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| DOI： |
| Key Words: inverse coagulation；NR；acid coagulant；inorganic salt coagulant；inorganic salt complex coagulant |
| Author Name | Affiliation | | SHEN Jia-feng | Beijing University of Chemical Technology | | WANG Hong | Beijing University of Chemical Technology | | ZHANG Li | Beijing University of Chemical Technology | | WANG Yi-qing | Beijing University of Chemical Technology | | ZHANG Li-qun | Beijing University of Chemical Technology |
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| Abstract: |
| NR was prepared by using reverse flocculation method，the effects of acid coagulants，inorganic salt coagulants，inorganic salt complex coagulant and coagulation conditions on the coagulation of natural rubber latex and the properties of NR were investigated.The results showed that，the coagulating effect of sulfuric acid was better than that of acetic acid or formic acid，and the physical properties of the three NR compounds were mainly equivalent.In inorganic salt coagulants，better coagulation effect of natural rubber latex was obtained by using calcium chloride.When the mass fraction of calcium chloride was 0.02，the physical properties of NR compound were similar to those of smoked sheet and standard rubber from Yunnan.When the inorganic salt complex coagulant was used，the flocculation effect was good by using the calcium chloride/sodium chloride，and the properties of NR compound were better than those of comparison sample.Appropriately increasing the temperature and stirring speed could also improve the flocculation of natural rubber latex. |
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