Coagulation methods and drying step are the key drivers of the dynamics of structuration of natural rubber during the maturation of coagula
The evolution of the mesostructure (structuring dynamics) of natural rubber (NR) during maturation after different modes of coagulation is poorly known, especially inside wet coagula. Therefore, coagula made from 3 different coagulation modes (sulfuric acid, formic acid, and natural coagulations) wi...
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2022-11-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0012002&mi=cd |
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| author | Jidapa Noinart Laurent Vaysse Natedao Musigamart Jérôme Sainte-Beuve Albert Flori Siriluck Liengprayoon Kittipong Rattanaporn Françoise Granet Frederic Bonfils |
| author_facet | Jidapa Noinart Laurent Vaysse Natedao Musigamart Jérôme Sainte-Beuve Albert Flori Siriluck Liengprayoon Kittipong Rattanaporn Françoise Granet Frederic Bonfils |
| author_sort | Jidapa Noinart |
| collection | DOAJ |
| description | The evolution of the mesostructure (structuring dynamics) of natural rubber (NR) during maturation after different modes of coagulation is poorly known, especially inside wet coagula. Therefore, coagula made from 3 different coagulation modes (sulfuric acid, formic acid, and natural coagulations) with different maturation durations (0, 2, 9, 16, 30, and 44 days) were studied. The mesostructure of NR samples was analyzed using SEC-MALS on wet coagula and on wet and dry crepes. For wet coagula coagulated with acids, only Mz and Mw decreased slightly with maturation time, while Mn and Gel>1 μ had no significant evolution during maturation. On the other hand, for wet coagula after natural coagulation, all mesostructure indicators evolved significantly with maturation time. The results showed that structuration increased along maturation time, generating microaggregates with larger size and more structured macrogel inside wet coagula after natural coagulation. This study found that creping process (comparison of wet coagula and wet crepes) had only a moderate effect on the structuration of NR samples. However, the drying process (comparison of wet and dry crepes) had an important effect on the structuration of rubber, especially for natural coagulation and formic acid coagulation. Coagulation with sulfuric acid appeared to slow down the phenomena related to the structuration of microaggregates and macrogel. |
| format | Article |
| id | doaj-art-bb203ef646dc4fd49b0a005d4d6dc463 |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2022-11-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-bb203ef646dc4fd49b0a005d4d6dc4632025-08-20T03:39:26ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2022-11-0116111161117610.3144/expresspolymlett.2022.85Coagulation methods and drying step are the key drivers of the dynamics of structuration of natural rubber during the maturation of coagulaJidapa NoinartLaurent VaysseNatedao MusigamartJérôme Sainte-BeuveAlbert FloriSiriluck LiengprayoonKittipong RattanapornFrançoise GranetFrederic BonfilsThe evolution of the mesostructure (structuring dynamics) of natural rubber (NR) during maturation after different modes of coagulation is poorly known, especially inside wet coagula. Therefore, coagula made from 3 different coagulation modes (sulfuric acid, formic acid, and natural coagulations) with different maturation durations (0, 2, 9, 16, 30, and 44 days) were studied. The mesostructure of NR samples was analyzed using SEC-MALS on wet coagula and on wet and dry crepes. For wet coagula coagulated with acids, only Mz and Mw decreased slightly with maturation time, while Mn and Gel>1 μ had no significant evolution during maturation. On the other hand, for wet coagula after natural coagulation, all mesostructure indicators evolved significantly with maturation time. The results showed that structuration increased along maturation time, generating microaggregates with larger size and more structured macrogel inside wet coagula after natural coagulation. This study found that creping process (comparison of wet coagula and wet crepes) had only a moderate effect on the structuration of NR samples. However, the drying process (comparison of wet and dry crepes) had an important effect on the structuration of rubber, especially for natural coagulation and formic acid coagulation. Coagulation with sulfuric acid appeared to slow down the phenomena related to the structuration of microaggregates and macrogel.http://www.expresspolymlett.com/letolt.php?file=EPL-0012002&mi=cdrubberlatex coagulationstructurationmaturationsec-mals |
| spellingShingle | Jidapa Noinart Laurent Vaysse Natedao Musigamart Jérôme Sainte-Beuve Albert Flori Siriluck Liengprayoon Kittipong Rattanaporn Françoise Granet Frederic Bonfils Coagulation methods and drying step are the key drivers of the dynamics of structuration of natural rubber during the maturation of coagula eXPRESS Polymer Letters rubber latex coagulation structuration maturation sec-mals |
| title | Coagulation methods and drying step are the key drivers of the dynamics of structuration of natural rubber during the maturation of coagula |
| title_full | Coagulation methods and drying step are the key drivers of the dynamics of structuration of natural rubber during the maturation of coagula |
| title_fullStr | Coagulation methods and drying step are the key drivers of the dynamics of structuration of natural rubber during the maturation of coagula |
| title_full_unstemmed | Coagulation methods and drying step are the key drivers of the dynamics of structuration of natural rubber during the maturation of coagula |
| title_short | Coagulation methods and drying step are the key drivers of the dynamics of structuration of natural rubber during the maturation of coagula |
| title_sort | coagulation methods and drying step are the key drivers of the dynamics of structuration of natural rubber during the maturation of coagula |
| topic | rubber latex coagulation structuration maturation sec-mals |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0012002&mi=cd |
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