| 真空辅助酸凝固天然橡胶加工性能的研究 |
| |
| 引用本文： | 何双,廖双泉,赵艳芳,户本相,廖小雪,赵富春. 真空辅助酸凝固天然橡胶加工性能的研究[J]. 热带作物学报, 2019, 40(11): 2205-2210. DOI: 10.3969/j.issn.1000-2561.2019.11.015 |
| |
| 作者姓名： | 何双 廖双泉 赵艳芳 户本相 廖小雪 赵富春 |
| |
| 作者单位： | 1. 海南大学材料科学与工程学院,海南海口 5702282. 海南大学热带岛屿资源先进材料教育部重点实验室,海南海口 570228 |
| |
| 基金项目： | 海南省自然科学基金项目(517073);热带岛屿资源先进材料教育部重点实验室开放基金项目(AM2017-15);海南省重大科技计划项目(ZDKJ2016020-2) |
| |
| 摘 要： | 天然橡胶（NR）的性能与制胶工艺密切相关,其中凝固是制胶工艺的重要环节。本文采用真空辅助酸凝固天然橡胶,对比自然凝固天然橡胶和酸凝固天然橡胶,探讨了真空辅助酸凝固对天然橡胶门尼粘度、理化性能、物理机械性能以及加工性能的影响。研究表明,不同凝固方法得到的NR理化性能有一定的差异,自然凝固NR的氮含量>真空辅助酸凝固NR的氮含量>酸凝固NR的氮含量,真空辅助酸凝固NR的塑性初值（P0）和塑性保持率（PRI）比自然凝固和酸凝固NR的P0和PRI都高,其中真空辅助酸凝固NR的PRI为85%,而酸凝固NR的PRI为75.7%。真空辅助酸凝固NR的交联密度高于自然凝固NR和酸凝固NR。真空辅助酸凝固NR的拉伸强度、拉断伸长率均高于自然凝固NR和酸凝固NR的拉伸强度、拉断伸长率,3种NR的拉伸强度分别为21.06、19.35、17.60 MPa。RPA测试表明,真空辅助酸凝固NR的弹性模量（G'）<自然凝固NR的G'<酸凝固NR的G',损耗因子（tanδ）变化趋势恰好相反,即真空辅助酸凝固得到的胶样的加工性能最好,自然凝固胶样次之,酸凝固胶样最差。
|
| 关 键 词： | 天然橡胶 真空辅助酸凝固 物理机械性能 加工性能 |
| 收稿时间： | 2019-03-04 |
Processing Properties of Vacuum-assisted-acid Coagulated Natural Rubber |
| |
| HE Shuang,LIAO Shuangquan,ZHAO Yanfang,HU Benxiang,LIAO Xiaoxue,ZHAO Fuchun. Processing Properties of Vacuum-assisted-acid Coagulated Natural Rubber[J]. Chinese Journal of Tropical Crops, 2019, 40(11): 2205-2210. DOI: 10.3969/j.issn.1000-2561.2019.11.015 |
| |
| Authors: | HE Shuang LIAO Shuangquan ZHAO Yanfang HU Benxiang LIAO Xiaoxue ZHAO Fuchun |
| |
| Affiliation: | 1. College of Material Science and Engineering, Hainan University, Haikou, Hainan 570228, China2. Key Laboratory of Tropical Island Resources Advanced Materials, Ministry of Education, Hainan University, Haikou, Hainan 570228, China |
| |
| Abstract: | The performance of natural rubber (NR) is closely related to the processing, and coagulation is an important step in the process. The study used vacuum-assisted-acid to coagulate natural rubber. Compared with naturally coagulated rubber, the effects of vacuum-assisted-acid coagulation on Mooney viscosity, physical and chemical properties, physical and mechanical properties and processing properties of natural rubber were discussed. The physical and chemical properties obtained by different solidification methods had certain differences of NR coagulated by different methods, and the nitrogen content of naturally coagulated NR, vacuum-assisted-acid coagulated NR and acid coagulated NR was in a downtrend. The plastic initial value (P0) and the plastic retention rate (PRI) of the vacuum-assisted-acid solidified NR was higher than that of the natural solidified NR and the acid solidified NR. The PRI of vacuum assisted acid coagulation NR was 85% and the PRI of acid solidification NR was 75.7%. The crosslinking density of vacuum-assisted-acid solidified NR was higher than that of natural solidified NR and acid solidified NR. The tensile strength and elongation at break of vacuum-assisted-acid coagulated NR were higher than that of natural coagulated NR and acid coagulated NR. The tensile strength of the three NRs was 21.06, 19.35 and 17.60 MPa. The RPA test showed that the G' of vacuum-assisted-acid solidified NR, natural solidified NR and acid solidified NR was in a increasing trend, while the tanδ of vacuum-assisted-acid solidified NR, natural solidified NR and acid solidified NR was in a downtrend. The sample obtained by vacuum-assisted-acid solidification had the best processing performance, followed by the natural solidified rubber, and the acid solidified rubber sample was the worst. |
| |
| Keywords: | natural rubber vacuum-assisted-acid coagulation physical and mechanical properties processing properties |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《热带作物学报》浏览原始摘要信息 |
|
点击此处可从《热带作物学报》下载全文 |
|
