溶剂性质对溶剂蒸气加速等规聚丁烯-1相转变的影响

姜继超; 宋新月; 毛禹东; 吴广峰; 张吉东

doi:10.11777/j.issn1000-3304.2021.21267

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溶剂性质对溶剂蒸气加速等规聚丁烯-1相转变的影响

研究论文 | 更新时间：2024-10-08

- 溶剂性质对溶剂蒸气加速等规聚丁烯-1相转变的影响
- Influence of Solvent Type on Acceleration of Phase Transition from Phase Ⅱ to Phase I of Polybutene-1 via Solvent Vapor Treatment
- 高分子学报 2022年53卷第3期页码：254-260
- 作者机构：
  
  1.中国科学院长春应用化学研究所高分子物理与化学国家重点实验室长春 130022
  2.中国科学技术大学应用化学与工程学院合肥 230026
  3.长春工业大学化学与工程学院长春 130012
- 作者简介：
  
  E-mail: jdzhang@ciac.ac.cn
- 基金信息：
  
  吉林省科技发展计划项目(20210201067GX)
- DOI：10.11777/j.issn1000-3304.2021.21267
  中图分类号：
- 纸质出版日期：2022-03-20，
  
  网络出版日期：2021-12-23，
  
  收稿日期：2021-09-10，
  
  修回日期：2021-12-03，
- 稿件说明：
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姜继超,宋新月,毛禹东等.溶剂性质对溶剂蒸气加速等规聚丁烯-1相转变的影响[J].高分子学报,2022,53(03):254-260.

Jiang Ji-chao,Song Xin-yue,Mao Yu-dong,et al.Influence of Solvent Type on Acceleration of Phase Transition from Phase Ⅱ to Phase I of Polybutene-1 via Solvent Vapor Treatment[J].ACTA POLYMERICA SINICA,2022,53(03):254-260.
姜继超,宋新月,毛禹东等.溶剂性质对溶剂蒸气加速等规聚丁烯-1相转变的影响[J].高分子学报,2022,53(03):254-260. DOI： 10.11777/j.issn1000-3304.2021.21267.

Jiang Ji-chao,Song Xin-yue,Mao Yu-dong,et al.Influence of Solvent Type on Acceleration of Phase Transition from Phase Ⅱ to Phase I of Polybutene-1 via Solvent Vapor Treatment[J].ACTA POLYMERICA SINICA,2022,53(03):254-260. DOI： 10.11777/j.issn1000-3304.2021.21267.

摘要

以50 ℃等温结晶后的等规聚丁烯-1 (PB-1)为研究对象，利用X射线衍射(XRD)和示差扫描量热技术(DSC)对不同溶剂蒸气处理的PB-1进行分析，并用原位XRD在线研究了溶剂熏蒸聚丁烯-1的 Ⅱ-Ⅰ 相转变过程. XRD与DSC结果表明除了水和醇类溶剂，其他大多数溶剂如正己烷、三氯甲烷、1

2-二氯乙烷、苯、甲苯、二甲苯、氯苯、乙酸乙酯、四氢呋喃、丙酮溶剂对Ⅱ-Ⅰ相转变过程均有明显的促进作用，可以使常规条件下4~5天的相转变加速到几十分钟. 通过原位XRD表征发现，溶剂熏蒸过程中聚丁烯-1的晶型转变过程为晶型Ⅱ消失的同时晶型I生成. 溶剂进入样品内部促进晶型转变主要分为两步：吸附和扩散. 吸附主要受溶解度参数和极性影响，水和乙醇等不良溶剂没有促进相变的效果；而扩散主要取决于溶剂分子的几何尺寸：单一方向的小尺寸更有利于进入样品内部，促进晶型转变. 通过这个研究我们认为正己烷或石油醚是加速PB-1的Ⅱ-I相转变的高效低毒溶剂，具有潜在的应用前景.

Abstract

A series of isotactic polybutene-1 (PB-1) in phase Ⅱ obtained

via

isothermal crystallization at 50 ℃ were treated with different solvent vapors. Wide-anlge X-ray diffraction (WAXD) and differential scanning calorimetry (DSC) techniques were used to evaluate such samples before and after treatment. Meanwhile

in situ

XRD was used to study the phase transition process of PB-1 annealed in different solvent vapors. Solvents

except water and alcohol solvents

such as

-hexane

chloroform

2-dichloroethane

benzene

toluene

xylene

chlorobenzene

ethyl acetate

tetrahydrofuran

acetone have obvious accelerating effect on the phase transition process

which can shorten the phase transition time from more than 4-5 days under normal conditions to tens of minutes. Through

in situ

XRD characterization

it was found that during the solvent annealing process

the crystal form Ⅱ of PB-1 disappeared while the crystal form I was formed. The entrance of solvents

which promotes the crystal form transformation

can be

divided into two steps: adsorption and diffusion. Adsorption is affected by solubility parameters and polarity

while diffusion mainly depended on the geometric size of solvent molecules: a small size in any direction will lead to a faster spread and larger promotion effect. Through this research

we found that

-hexane or petroleum ether is an efficient and low-toxic solvent that accelerates the Ⅱ-I phase transition of PB-1

and has good application prospects.

关键词

等规聚丁烯-1晶型转变溶剂蒸气退火X射线衍射

Keywords

Isotactic polybutene-1Crystal transformationSolvent vapor annealingX-ray diffraction

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等规聚丁烯-1与等规聚丙烯间界面的结构与性能研究