橡胶树不同采集时段天然橡胶性能的研究 |
Study on Properties of NR in Different Collection Periods of Hevea Brasiliensis |
投稿时间:2021-03-13 修订日期:2021-03-13 |
DOI:10.12136/j.issn.1000-890X.2021.10.0779 |
中文关键词: 天然橡胶 割胶 采集时段 相对分子质量 热稳定性 交联密度 |
英文关键词: NR tapping collection period molecular weight thermal stability cross-linking density |
基金项目:国家自然科学基金资助项目(32060072);中国博士后科学基金资助项目(2021M693872);石河子大学高层次人才科研启动项目(RCZK202046) |
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中文摘要: |
研究橡胶树割胶后不同采集时段天然橡胶(NR)的相对分子质量及其分布、热稳定性、交联密度,提出高品质大相对分子质量NR的采集方法。结果表明,橡胶树割胶后采集时段为30~45 min NR的相对分子质量大、相对分子质量分布窄、热稳定性好、交联密度大,商业采集高品质大相对分子质量NR应集中在这个时段。 |
英文摘要: |
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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