Functionalized Imidazolium-based Ionomers as Effective Toughening Agents for Poly(lactic acid)

Hang Wang; Hao-dong Hu; Xiang-jian Chen; Li Pan; Kun-yu Zhang; Yue-sheng Li

doi:10.11777/j.issn1000-3304.2021.21078

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Functionalized Imidazolium-based Ionomers as Effective Toughening Agents for Poly(lactic acid)

Research Article | 更新时间：2023-12-20

- Functionalized Imidazolium-based Ionomers as Effective Toughening Agents for Poly(lactic acid)
- ACTA POLYMERICA SINICA Vol. 52, Issue 10, Pages: 1323-1333(2021)
- 作者机构：
  
  1.(天津大学 1化工学院，材料科学与工程学院天津市材料复合与功能化重点实验室天津 300350) (，天津 300072)
  2.天津大学 1化工学院，天津化学化工协同创新中心，天津 300072
  3.Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072
- 作者简介：
  
  Kun-yu Zhang, E-mail: kyzhang@tju.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2021.21078
  CLC：
- Published：20 October 2021，
  
  Published Online：25 July 2021，
  
  Received：12 March 2021，
  
  Revised：27 March 2021，
扫描看全文
王行,胡浩东,陈相见等.含功能化咪唑鎓离聚物增韧改性聚乳酸的研究[J].高分子学报,2021,52(10):1323-1333.

Wang Hang,Hu Hao-dong,Chen Xiang-jian,et al.Functionalized Imidazolium-based Ionomers as Effective Toughening Agents for Poly(lactic acid)[J].ACTA POLYMERICA SINICA,2021,52(10):1323-1333.
王行,胡浩东,陈相见等.含功能化咪唑鎓离聚物增韧改性聚乳酸的研究[J].高分子学报,2021,52(10):1323-1333. DOI： 10.11777/j.issn1000-3304.2021.21078.

Wang Hang,Hu Hao-dong,Chen Xiang-jian,et al.Functionalized Imidazolium-based Ionomers as Effective Toughening Agents for Poly(lactic acid)[J].ACTA POLYMERICA SINICA,2021,52(10):1323-1333. DOI： 10.11777/j.issn1000-3304.2021.21078.

摘要

以生物质来源的氯醚弹性体和羟乙基咪唑、PEG端咪唑单体为原料，通过简单的季胺化和离子交换反应，成功制备了2种新型功能化的生物基离聚物(ECO-OH-PF

，ECO-EG-PF

)，并将其应用于聚乳酸的共混增韧改性. 离聚物ECO-EG-PF

呈现典型的弹性体特征，而ECO-OH-PF

表现为塑料性能. 在聚乳酸(PLA)与离聚物共混体系中，ECO-OH-PF

表现出对PLA更优的增韧效果. PLA/ECO-OH-PF

(80/20)共混物断裂伸长率可提高至241%，而拉伸强度可保持在47.8 MPa. 动态机械分析和扫描电子显微镜的结果表明离子-偶极相互作用和氢键相互作用使得ECO-OH-PF

与PLA组分之间具有良好的相容性，形成了较强的界面粘附. 而且由于折光指数相匹配，PLA/ECO-OH-PF

共混物表现出良好的透明性，可见光范围内的透过率可达77%~87%. 因而ECO-OH-PF

可成为PLA良好的增韧改性剂，促进PLA基材料在透明包装等领域获得广阔的应用.

Abstract

Two kinds of novel functionalized bio-based ionomers (ECO-OH-PF

ECO-EG-PF

) were successfully synthesized through simple quaternization and ion exchange reactions from commercialized chloroether rubber and 1-(2-hydroxyethyl) imidazole

new designed PEG-based imidazole. The two ionomers were studied as toughening agents for poly(lactic acid) (PLA) by a melt blending method. Due to the different side chain structures

the two ionomers possess completely different physical properties

thus leading to totally different toughening effect for the PLA/ionomers binary blends. DSC and DMA results indicated that the ECO-EG-PF

mainly played a role of plasticizer for PLA

leading to enhancement in cold crystallization and flexibility of PLA. The PLA/ECO-EG-PF

(90/10) blend exhibited a high tensile strength of 63.1 MPa

an improved elongation at break up to 135% and impact strength of 4.8 kJ/m

. However

the transparency of the PLA/ECO-EG-PF

(90/10) blend was decreased because of the unmatching refractive index (RI) of the large PEG segment with PLA and the improved crystallinity. Compared with the ECO-EG-PF

the ECO-OH-PF

ionomer endowed PLA with better transparency and tensile ductility. Especially

the PLA/ECO-OH-PF

(80/20) binary blend achieved the optimal mechanical properties with the tensile strength of 47.8 MPa and high elongation at break (241%). The results of DMA and SEM suggest that ECO-OH-PF

and PLA had a good interfacial compatibility and adhesion

which is due to the ion-dipole interactions and hydrogen bonding formed between ECO-OH-PF

and the PLA matrix. Moreover

the PLA/ECO-OH-PF

(90/10) blend showed a high light transmittance of 77%‒87% in the visible light range

which is comparable to that of PLA.

关键词

聚乳酸离聚物非价键相互作用增韧透明性

Keywords

Poly(lactic acid)IonomerNoncovalent interactionsTougheningTransparency

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