|
二维码（扫一下试试看！） |
| 白炭黑的特性及其硅烷化反应机理和混炼工艺 |
| Characteristics of Silica and Its Silanization Reaction Mechanism and Mixing Process |
| Received:December 23, 2019 Revised:December 23, 2019 |
| DOI：10.12135/j.issn.1006-8171.2020.9.0515 |
| 中文关键词: 白炭黑；特性；硅烷化；反应机理；混炼工艺 |
| 英文关键词: silica；characteristic；silanization；reaction mechanism；mixing process |
| 基金项目:浙江省博士后科研项目择优资助项目(2020) |
| 中图分类号: |
| Author Name | Affiliation | E-mail | | WANG Danling* | 中策橡胶集团有限公司 | yogidan@163.com | | SONG Yihu | 浙江大学?高分子科学与工程学院 | | | FENG Jie | 浙江工业大学?材料科学与工程学院 | | | REN Fujun | 中策橡胶集团有限公司 | | | ZUO Min | 浙江大学?高分子科学与工程学院 | | | CHEN Yulong | 浙江工业大学?材料科学与工程学院 | |
|
| Hits: 1505 |
| Download times: 1444 |
| 中文摘要: |
| 综述白炭黑和硅烷偶联剂的特性、两者之间的化学反应机理和反应动力学以及白炭黑胶料的混炼工艺特点。白炭黑的表面积是决定其补强能力的重要因素，结构度决定了其聚集体之间的自由体积，高分散性白炭黑小聚集体尺寸占比更大，因此更有利于分散；白炭黑絮凝对最终产品的性能和加工过程都有不良影响，提高白炭黑的硅烷化效率是降低絮凝的有效方法；白炭黑表面大量的极性羟基导致其与非极性橡胶相容性差，硅烷偶联剂的偶联作用使白炭黑的补强效果显著提高，硅烷的吸附能力是硅烷化反应速率的决定性因素，烷基链的空间位阻效应在硅烷化反应和硫化反应中起着重要作用，含长链取代基以及巯基硅烷等新型偶联剂能获得更高的白炭黑分散性；采用啮合型密炼机、提高排胶温度、降低冷却温度、减小填充系数、使用空气注射均有利于提高白炭黑的硅烷化效率。 |
| 英文摘要: |
| The characteristics of silica and silane coupling agent，the chemical reaction mechanism and reaction kinetics between the two，and the characteristics of the mixing process of silica compound were reviewed.The surface area of silica was an important factor that determined its reinforcing ability，and the structure degree of silica determined the free volume between its aggregates.The ratio of small aggregates of high-dispersity silica was higher，which was more conducive to dispersion.The silica flocculation had an adverse effect on the performance and processing of the final product，and increasing the silanization efficiency of silica was an effective method to reduce flocculation.The large number of polar hydroxyl groups on the surface of silica resulted in poor compatibility with non-polar rubber，but the coupling effect of the silane coupling agent significantly enhanced the reinforcing effect of silica.The adsorption capacity of the silane was the decisive factor for the rate of silanization reaction.The steric hindrance effect of the alkyl chain played an important role in the silanization and vulcanization reaction.New coupling agents containing long-chain substituents and mercaptosilanes，etc.could obtain higher silica dispersion.By Use intermeshing mixer，increasing debind temperature，reduce cooling temperature and filling factor，utilize air injection were benefcial to improve the silanization efficiency of silica. |
|
View Full Text
View/Add Comment Download reader |
| Close |
