Primary Structure of Polyethylene Copolymers and Dominant Factors of Gelation

聚乙烯共聚物的一级结构及凝胶化的主导因素

• 批准号: 12650891
• 负责人: OKABE Masaru
• 金额: $ 1.02万
• 依托单位: Kanagawa Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650891/
• 关键词: thermoreversible gel; ethylene; propvlene copoymer; 1-hexene copolymer; junction size of gel; polyethylene; gel-melting temperature; Flory-Huggins interaction parameter; Markov statistics; 1-ヘキセン共重合体; 1次構造; ゲルの架橋長; 高分子; 溶媒間相互作用パラメーター; 高次構造 /

A linear low-density polyethylene (LLDPE) in organic solvents (such as decane, cyclopentane, and toluene) converts to thermoreversible gel near room temperature. The junction point size ζ in number of ethylene units per crystalline sequence was estimated as a function of number of short-chain branching (SCB) as well as the Flory-Huggins interaction parameter X 12 between polymer and solvent. Moreover, weight-average length in number of consecutive ethylene units L(E)w was estimated from ^<13>C NMR measurement assuming the Markov process and the size ζ was compared with the primary structure length L(E)w. The following facts were obtained:1. The junction point size ζ became larger than the length L(E)w when the gel was prepared in a poor solvent. While, the size ζ was nearly equal to the length L(E)w with decreasing % u parameter.2. The size ζ decreased with increasing SCB, and increased with increasing 12 parameter

线性低密度聚乙烯（LLDPE）在有机溶剂（如癸烷、环戊烷和甲苯）中在室温附近转化为热可逆凝胶。每个结晶序列中的乙烯单元数的连接点尺寸估计为短链支化数（SCB）以及聚合物和溶剂之间的Flory-Huggins相互作用参数X12的函数。此外，假设马尔可夫过程，从11 C NMR测量估计连续乙烯单元数的重均长度L（E）w<13>，并将尺寸λ与一级结构长度L（E）w进行比较。获得了以下事实：1。当在不良溶剂中制备凝胶时，连接点尺寸ε变得大于长度L（E）w。而随着u参数的减小，粒子的大小近似等于长度L（E）w.随着SCB值的增加，颗粒尺寸逐渐减小，随着12个参数的增加，颗粒尺寸逐渐增大

项目成果

藤谷 秀幸: "エチレン/1-ヘキセンランダムコポリマーのゲル化とゲルのモルホロジー"神奈川工科大学研究報告. B-26. 88-89 (2002)

Hideyuki Fujitani：“乙烯/1-己烯无规共聚物的凝胶化和凝胶形态”神奈川技术研究所研究报告B-26（2002）。

藤谷 秀幸: "エチレン/1-ヘキセンランダムコポリマーのゲル化とゲルのモルホロジー"神奈川工科大学研究報告. B-26巻. 88-89 (2002)

Hideyuki Fujitani：“乙烯/1-己烯无规共聚物的凝胶化和凝胶形态”神奈川技术研究所研究报告第 B-26 卷（2002 年）。

Motoyuki Okada: "Formation of Junction Zones in Thermoreversible Gelation Process of Ethylene-Propylene Random Copolymer/Toluene Systems"SEN'I GAKKAISHI. Vol.56. 104-108 (2000)

Motoyuki Okada：“乙烯-丙烯无规共聚物/甲苯体系的热可逆凝胶化过程中连接区的形成”SENI GAKKAISHI。

Masaru Okabe: "Crystalline Junction Size of Ethylene/Propylene Random Copolymer Gel"Reports on Progress in Polymer Physics in Japan. 43. 707-711 (2000)

Masaru Okabe：《乙烯/丙烯无规共聚物凝胶的结晶结尺寸》报道日本高分子物理学进展。

Masaru Okabe: "Crystalline Junction Size of Ethylene/Propylene Random Copolymer Gel"Reports on Progress in Polymer Physics in Japan. Vol.43. 707-711 (2000)

Masaru Okabe：《乙烯/丙烯无规共聚物凝胶的结晶结尺寸》报道日本高分子物理学进展。