直链淀粉衍生物对聚甲基丙烯酸甲酯热性能的影响研究

赵崴; 代枭; 张丽丽; 沈军

doi:10.11777/j.issn1000-3304.2024.24018

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直链淀粉衍生物对聚甲基丙烯酸甲酯热性能的影响研究

研究论文 | 更新时间：2024-11-26

- 直链淀粉衍生物对聚甲基丙烯酸甲酯热性能的影响研究
- Effect of Amylose Derivatives on Thermal Properties of Poly(methyl methacrylate)
- 高分子学报 2024年55卷第9期页码：1191-1199
- 作者机构：
  
  1.哈尔滨工程大学材料科学与化学工程学院哈尔滨 150001
  2.北京科技大学土木与资源工程学院北京 100083
- 作者简介：
  
  E-mail: zhanglili1984@hrbeu.edu.cn
  shenjun@hrbeu.edu.cn
- 基金信息：
  
  国家自然科学基金(基金号 ┣51673052;21474024);51073046┫;黑龙江省自然科学基金重点项目(基金号 ZD2021B001);黑龙江省自然科学基金联合引导项目(基金号 LH2023E063)
- DOI：10.11777/j.issn1000-3304.2024.24018
  中图分类号：
- 纸质出版日期：2024-09-20，
  
  网络出版日期：2024-05-17，
  
  收稿日期：2024-01-17，
  
  录用日期：2024-02-23
- 稿件说明：
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赵崴, 代枭, 张丽丽, 沈军. 直链淀粉衍生物对聚甲基丙烯酸甲酯热性能的影响研究. 高分子学报, 2024, 55(9), 1191-1199

Zhao, W.; Dai, X.; Zhang, L. L.; Shen, J. Effect of amylose derivatives on thermal properties of poly(methyl methacrylate). Acta Polymerica Sinica, 2024, 55(9), 1191-1199
赵崴, 代枭, 张丽丽, 沈军. 直链淀粉衍生物对聚甲基丙烯酸甲酯热性能的影响研究. 高分子学报, 2024, 55(9), 1191-1199 DOI： 10.11777/j.issn1000-3304.2024.24018.

Zhao, W.; Dai, X.; Zhang, L. L.; Shen, J. Effect of amylose derivatives on thermal properties of poly(methyl methacrylate). Acta Polymerica Sinica, 2024, 55(9), 1191-1199 DOI： 10.11777/j.issn1000-3304.2024.24018.

摘要

为探索自由基聚合所得聚合物结构与热性能的可控方法，采用氨基甲酸酯化法合成4种具有规则螺旋结构的直链淀粉衍生物，即直链淀粉-三(4-氯苯基氨基甲酸酯)、直链淀粉-三(苯基氨基甲酸酯)、直链淀粉-三(4-甲基苯基氨基甲酸酯)和直链淀粉-三(

-(-)-

-甲基苄基氨基甲酸酯)衍生物，并将其作为手性添加剂诱导甲基丙烯酸甲酯(MMA)的自由基聚合，进一步探究直链淀粉衍生物对所得聚甲基丙烯酸甲酯(PMMA)热性能的影响. 通过核磁共振氢谱和圆二色光谱等确认直链淀粉衍生物的结构规整，取代完全，并具有规则的手性螺旋结构. 采用凝胶色谱法、动态光散射、X射线衍射和热失重分析等对所得PMMA的分子量及其分布、分子链聚集行为和热性能进行了详细表征. 结果表明，由直链淀粉衍生物诱导所得PMMA的热稳定性能获得明显改善，其中以对位甲基取代直链淀粉衍生物的诱导效果最好，可使PMMA的玻璃化转变温度和起始分解温度分别提高26和71 ℃，为甲基丙烯酸酯类单体的可控聚合方法提供了新思路.

Abstract

To investigate the effective procedure for controlled polymer structure and thermal properties through radical polymerization

amylose derivatives were used as chiral additives to induce the radical polymerization of methyl methacrylate (MMA). The effect of amylose derivatives on the structure and thermal properties of poly(methyl methacrylate) (PMMA) was subsequently explored. Four kinds of amylose derivatives were synthesized through carbamoylation

including amylose tri(4-chlorophenyl carbamate) (ACPC)

amylose tri(phenylcarbamate) (ATPC)

amylose tri(4-methylphenylcarbamate) (AMPC) and amylose tri(

-(-‍)‍-‍

α‍

-methylbenzyl carbamate) (ASMBC). The structures and degree of substitution of the amylose derivatives were characterized by magnetic resonance spectroscopy (

H-NMR) and circular dichroism (CD) spectra

demonstrating complete substitution and regular chiral helical structure of the obtained derivatives. The thermal stability of PMMA was assessed using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA)

revealing a significant enhancement in the thermal stability of PMMA induced by amylose derivatives. Furthermore

the substituents properties of the derivatives and the polarity of the polymerization solvent significantly influenced the radical polymerization behavior of MMA. Both bulk polymerization and solution polymerization were effective in improving the thermal properties of PMMA

with the solution polymerization system utilizing non-polar octane as the solvent achieving the most significa

nt improvement. Among the amylose derivatives

the para-methyl-substituted amylose derivatives (AMPC) demonstrated the most effective induction effect

which could increase the glass transition temperature (

) and the onset decomposition temperature (

) of PMMA by 26 and 71 ℃

respectively. The induction mechanism of amylose derivatives was investigated using gel permeation chromatography (GPC)

dynamic laser light scattering (DLS) and X-ray diffraction (XRD). The results indicated that MMA monomers could be arranged in order along the chiral helical cavity of the derivatives. This ordered arrangement can not only improve the structure order of polymer molecular chains

but also have a positive effect on its aggregation behavior

thereby achieving effective control of the thermal properties of PMMA. It suggests that the radical polymerization behavior and thermal properties of MMA can be effectively regulated by selecting appropriate helical polymers

offering a novel idea for exploring the controlled radical polymerization method of methacrylate monomers.

关键词

直链淀粉衍生物聚甲基丙烯酸甲酯热稳定性自由基聚合

Keywords

Amylose derivativesPoly(methyl methacrylate)Thermal stabilityFree radical polymerization

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