超精细的完全化天然,通过与烯和烯烯单体的移植共聚变来修改
Krittaphorn Longsiri1, Phattarin Mora2, Watcharapong Peeksuntiye1
1Research Unit in Polymeric Materials for Medical Practice Devices, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
Bioresources and bioprocessing
|April 22, 2024
概括
这项研究使用移植共聚合开发了经过修改的超细完全化天然 (UFPNR) 粉末. 增强的UFPNR显示了更好的热稳定性和颗粒特性,使其成为各种聚合物有前途的硬化填充剂.
科学领域:
- 聚合物科学与工程 聚合物科学与工程
- 材料科学 材料科学 材料科学
- 技术 技术 技术
背景情况:
- 天然的修改对于先进的材料应用至关重要.
- 超细粉状天然 (UFPNR) 提供了独特的加工优势.
- 无蛋白化天然 (DPNR) 作为改善性能的基础.
研究的目的:
- 通过移植共聚合来合成和描述修改后的UFPNR.
- 调查单体含量和比例对接种效率和热性质的影响.
- 评估改性UFPNR作为聚合物硬化填充剂的适用性.
主要方法:
- 聚烯 (St) 和烯 (AN) 在DPNR上的乳液移植共聚化.
- 优化单体含量 (15 phr) 和St/AN比率 (80:20) 以获得最大的接种效率.
- 电子束辐射和喷雾干燥以产生改性UFPNR.
- 粒子大小和热稳定性的表征 (Td5).
主要成果:
- 在优化条件下实现了高达86%的接种效率.
- 产生的相对球形的改性UFPNR粒子 (约. 4.4μm) 通过电子束辐射 (高达300kGy) 和喷雾干燥.
- 观察到高热稳定性,降解温度 (Td5) 在349-356°C之间.
结论:
- 开发的DPNR-g-(PS-co-PAN) 显示出出色的接种效率和热稳定性.
- 修改后的UFPNR颗粒具有理想的形态和尺寸,适用于填充剂应用.
- 修改后的UFPNR是一种适合用于各种聚合物的硬化填充剂.
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