| Study on Properties of NR in Different Collection Periods of Hevea Brasiliensis |
| Received:March 13, 2021 Revised:March 13, 2021 |
| DOI：10.12136/j.issn.1000-890X.2021.10.0779 |
| Key Words: NR；tapping；collection period；molecular weight；thermal stability；cross-linking density |
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| Abstract: |
| Study on the molecular weight and its distribution，thermal stability and cross-linking density of natural rubber（NR） at different collection periods after Haeve brasiliensis tapping．The collection method of high-quality and large molecular weight NR was proposed．The results showed that the NR during the collection period of 30～45 min after tapping had a large molecular weight，narrow molecular weight distribution，good thermal stability and high cross-linking density．Therefore a commercial collection of high-quality NR with large molecular weight should be concentrated in this period． |
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