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| 采用差示扫描量热法测定天然橡胶玻璃化转变温度的影响因素 |
| Factors Affecting Determination of Glass Transition Temperature of Natural Rubber Using Differential Scanning Calorimetry |
| Received:November 30, 2023 Revised:November 30, 2023 |
| DOI：10.12137/j.issn.2095-5448.2025.02.0114 |
| 中文关键词: 差示扫描量热法 天然橡胶 玻璃化转变温度 |
| 英文关键词: differential scanning calorimetry glass transition temperature natural rubber |
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| 中文摘要: |
| 研究采用差示扫描量热法（DSC）测试天然橡胶的玻璃化转变温度（Tg）的影响因素。结果表明：升温速率及保温程序对天然橡胶的Tg测试结果影响较大，在一定范围内改变载气气氛、气体流速、试样质量均对天然橡胶的Tg测试结果无明显影响。本试验确定的天然橡胶Tg测试优选条件为：在氮气气氛下，升温速率为10 ℃·min-1，气体流速为50 mL·min-1，保温程序为在－80 ℃条件下保温10 min，试样质量为10 mg。 |
| 英文摘要: |
| Factors affecting the determination of glass transition temperature（Tg） of natural rubber by differential scanning calorimetry，and the results showed that heating rate and insulation program have a significant impact on Tg of natural rubber，changing the carrier gas atmosphere，gas flow rate，and sample mass within a certain range has no significant effect on the Tg test results of natural rubber.The optimal conditions for Tg testing of natural rubber determined in this experiment were：under a nitrogen atmosphere，the heating rate was 10 ℃·min-1，the gas flow rate was 50 mL·min-1，the insulation program was to maintain the temperature at －80 ℃ for 10 minutes，and the mass of sample was 10 mg. |
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