长链分支生物基聚 (?? 丁二甲二酸) 合聚使用五乙作为分支剂:合成,热力学和风学特性
Ruixue Niu1,2, Zhening Zheng3, Xuedong Lv1
1School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China.
Polymers
|August 12, 2023
概括
在聚二甲基酸 (PBD) 中添加五甲基 (PER) 分枝剂可显著提高其机械性能和结晶. 这种可生物降解的聚显示出更好的冲击强度和拉伸模量,使其适用于先进的应用.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 可生物降解的聚合物
背景情况:
- 长链分支结构提高了聚合物的融强度和吹塑性.
- 可生物降解的聚烯对于可持续材料的发展至关重要.
研究的目的:
- 为了合成分支聚二甲基酸 (PBD),使用甲基 (PER) 作为分支剂.
- 研究PER诱导的分支对PBD结构,机械和热性能的影响.
主要方法:
- 使用PER作为分支剂合成分支PBD.
- 使用核磁共振质子光谱 (1H NMR) 和里埃变换红外光谱 (FT-IR) 进行了表征.
- 评估机械性质 (冲击强度,拉伸模量),结晶行为 (广角X射线衍射,微分扫描热度计) 和质性质 (动态粘弹性).
主要成果:
- 在PBD中引入0.25-0.5%mol%PER生成的分支和交联结构.
- 划痕冲击强度增加了85%,拉伸模量增加了206%,1mol% PER.
- 与线性PBD相比,PER分支PBD表现出增强的结晶能力.
- 在低剪率下,在分支PBD中观察到剪切加厚的行为.
结论:
- 乙醇有效地引入了PBD的分支,显著改善了机械性能和结晶.
- 分支PBD表现出优越的性能,包括增强的冲击和抗拉强度,使其成为要求高的应用程序的有希望的材料.
- 该研究强调了受控分支的潜力,以定制可生物降解聚合物的特性.
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