| 硫化杜仲胶的结晶行为及其动力学研究 |
| Study on Crystallization Behavior and Kinetics of Vulcanized EUG |
| 投稿时间：2024-03-22 修订日期：2024-03-22 |
| DOI：10.12136/j.issn.1000-890X.2026.01.0011 |
| 中文关键词: 杜仲胶 等温结晶 晶型 动力学 表面自由能 |
| 英文关键词: EUG isothermal crystallization crystal form kinetics surface free energy |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 采用差示扫描量热仪、X射线衍射仪和偏光显微镜分析杜仲胶（EUG）硫化胶的等温结晶过程，利用Avrami方程和霍夫曼成核理论分析EUG硫化胶的晶体的形核和长大方式。结果表明：不同结晶温度下EUG硫化胶的结晶度相近，但α晶型和β晶型的占比不同；当结晶温度高于25 ℃时有利于α晶型的生长，EUG硫化胶的晶体以均匀形核的方式向三维方向长大，当结晶温度低于25 ℃时有利于β晶型的生长，EUG硫化胶的晶体以非均匀形核的方式向三维方向长大；在相同结晶温度下，EUG硫化胶的α晶型的生长速率小于β晶型，α晶型和β晶型的表面自由能分别为1.91×1011和2.30×10 11 mJ·m -2。 |
| 英文摘要: |
| The isothermal crystallization process of Eucommia ulmoides gum（EUG） vulcanizate was analyzed using differential scanning calorimetry，X-ray diffraction and polarized light microscope.According to Avrami equation and Hoffman nucleation theory，the nucleations and growths of crystals of EUG vulcanizate were analyzed.The results showed that the crystallinities of EUG vulcanizate were similar at different crystallization temperatures，but the proportions of α and β crystal forms were different.When the crystallization temperature was higher than 25 ℃，it was beneficial to the growth of α crystal form，and
the crystals of EUG vulcanizate grew in three dimensions through homogeneous nucleation. When the crystallization temperature was lower than 25 ℃，it was beneficial to the growth of β crystal form，and the
crystals of EUG vulcanizate grew in three dimensions through heterogeneous nucleation.At same crystallization temperature，the growth rate of α crystal form of EUG vulcanizate was smaller than that of β crystal form，and the surface free energies of α and β crystal forms were 1.91×1011 and 2.30×10 11 mJ·m -2，respectively. |
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