Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 51303146 |
| 光热氧化条件下新型双峰聚乙烯分子结构稳定性的研究 | |
| 黄健 | |
| 主持机构 | 武汉理工大学 |
| 开始日期 | 2014 |
| 结束日期 | 2016 |
| 资助经费 | 250000(CNY) |
| 项目类别 | 青年科学基金项目 |
| 资助机构 | CN-NSFC（国家自然科学基金） |
| 语种 | 中文 |
| 国家 | 中国 |
| 英文简介 | The Short Chain Branching (SCB) of Novel Bimodal Polyethylene was highly distributed on the longest polymer chain so as to solve the counter effect of the mechanical strength and the processability of the material. Due to the excellent environmental stress cracking resistance (ESCR), the material had been applied in many important projects around the world. However, the introduction of SCB also produced tertiary carbon which has hydrogen atom that can easily undergo hydrogen abstraction with free radicals and lowering the photo/thermal stability of the material. This project will focus on material structure such as distributions of molecular weight and its branchings, tie-molecule density,lamellae thickness and spherulite size etc. By combining with factors of temperature, radiation strength and oxygen concentration during photo/thermal oxidation, the reaction dynamics and mechanisms of ESCR were analyzed. Based on Tie-molecule formation and strength formation theory, computer model of material deterioration will be built upon these results. Threshold value of photo/thermal oxidation level that can be used to evaluate the extent material deterioration will be determined. |
| 中文关键词 | 双峰聚乙烯 ; 短支链 ; 系带分子 ; 光热稳定性 |
| 来源机构 | 武汉理工大学 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/346705 |
| 推荐引用方式 GB/T 7714 | 黄健.光热氧化条件下新型双峰聚乙烯分子结构稳定性的研究.2014. |
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