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林产化学与工业

林产化学与工业 ›› 2022, Vol. 42 ›› Issue (3): 90-96.doi: 10.3969/j.issn.0253-2417.2022.03.012

• 研究报告 • 上一篇    下一篇

乙基纤维素-脂松香-油脂基聚合物的合成及其压敏胶应用性能

郭晓亮1,2, 祁思迈1,2, 王春鹏1,2, 储富祥1,2, 王基夫1,2,*()   

  1. 1. 中国林业科学研究院 林产化学工业研究所；生物质化学利用国家工程实验室；国家林业局和草原局林产化学工程重点实验室；江苏省生物质能源与材料重点实验室，江苏 南京 210042
    2. 南京林业大学 江苏省林业资源高效加工利用协同创新中心，江苏 南京 210037
  • 收稿日期:2021-02-26 出版日期:2022-06-28 发布日期:2022-07-04
  • 通讯作者: 王基夫 E-mail:wjf118@126.com
  • 作者简介:王基夫，研究员，博士生导师，主要从事生物质材料功能化研究；E-mail: wjf118@126.com
    郭晓亮(1996—)，男，河南林州人，硕士生，从事生物质材料功能化研究
  • 基金资助:
    国家自然科学基金资助项目(31971600)

Synthesis of Ethyl Cellulose, Gum Rosin and Fatty Acid Based Polymer and Its Application Performance as Pressure Sensitive Adhesive

Xiaoliang GUO1,2, Simai QI1,2, Chunpeng WANG1,2, Fuxiang CHU1,2, Jifu WANG1,2,*()   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing, 210042, China
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2021-02-26 Online:2022-06-28 Published:2022-07-04
  • Contact: Jifu WANG E-mail:wjf118@126.com

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摘要：

将脂松香(GR)与甲基丙烯酸缩水甘油酯(GMA)合成脂松香基甲基丙烯酸酯(GRGMA)，然后通过原子转移自由基聚合(ATRP)合成乙基纤维素-脂松香-油脂基聚合物(EC-R-LMA)，并采用FT-IR、1H NMR、DSC、TG/DTG、应力-应变测试对GRGMA及EC-R-LMA的结构和性能进行表征。研究结果表明：单体转化率均高于90%；随着GRGMA摩尔分数从10%增加至70%，EC-R-LMA的Tg从-61.3 ℃升高至62.58 ℃；当GRGMA摩尔分数从30%升高至35%，EC-R-LMA拉伸强度从0.41 MPa升高至0.50 MPa，经交联后，交联聚合物(BMI-EC-R-LMA)拉伸强度分别升高至1.04和1.27 MPa；此外，当GRGMA和LMA物质的量之比为1∶9和2∶8时，Tg分别为-61.3和-52.9 ℃，可用作压敏胶(PSA)，GRGMA充当PSA的硬单体，而不是增黏树脂。GRGMA摩尔分数从10%升高至20%，压敏胶180°剥离强度从0.56 N/cm升高至1.08 N/cm，持黏性能从2 h升高至大于72 h。

关键词: 脂松香, 乙基纤维素, 原子转移自由基聚合, 压敏胶

Abstract:

Gum rosin derived methacrylate(GRGMA) was firstly synthesized by the esterification reaction between gum rosin(GR) and glycidyl methacrylate(GMA). Subsequently, atom transfer radical polymerization(ATRP) was applied to fabricate ethyl cellulose-gum rosin-fatty acid derived co-polymer(EC-R-LMA). The structure and properties of GRGMA and EC-R-LMA were then characterized by FT-IR, 1H NMR, DSC, TG/DTG, universal tensile machine and contact angle measurement. It was found that the monomer conversion was higher than 90%. With the increase of the molar ratio of GRGMA from 10% to 70%, the Tg of EC-R-LMA increased from -61.3 ℃ to 62.58 ℃. Particularly, when the molar ratio of GRGMA increased from 30% to 35%, the tensile strength at break increased from 0.41 MPa to 0.50 MPa, whereas the tensile strength at break of the cross-linking polymer(BMI-EC-R-LMA) increased to 1.04 and 1.27 MPa respectively after cross-linking. It was also observed that when the molar ratio of GRGMA and LMA was set to 1∶9 and 2∶8, the Tg of EC-R-LMAs were -61.3 ℃ and -52.9 ℃, respectively, which could be used as a pressure-sensitive adhesive(PSA). Notably, GRGMA acted as a new type of hard monomer for the PSA rather than as a tackifying resin. While the molar content of GRGMA increased from 10% to 20%, the 180° peel strength of PSA increased from 0.56 N/cm to 1.08 N/cm, and the shear resistance property increased from 2 h to more than 72 h.

Key words: gum rosin, ethyl cellulose, atom transfer radical polymerization, pressure sensitive adhesive

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