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可降解,紫外线交叉连接的压力敏感粘合剂,由thioester-功能性烯酸共聚物制成

Rohani Abu Bakar^1,2, Kyle S Hepburn³, Joseph L Keddie⁴

¹School of Mathematics & Physics and School of Chemistry & Chemical Engineering, University of Surrey, Guildford, GU2 7XH, UK.

Angewandte Chemie (International ed. in English)

|June 28, 2023

概括

研究人员使用酸链接开发了可降解的压力敏感粘合剂 (PSA). 这些新型粘合剂在使用过程中保持性能,并完全溶解,以便更容易回收玻璃和纸板等包装材料.

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
可持续化学可持续化学

背景情况:

传统的压力敏感粘合剂 (PSA) 使用不可逆转的交叉连接,创建不溶性网络,阻碍玻璃和纸板等材料的回收利用.
这些持久网络的存在使废物管理复杂化,并限制了包装的循环经济潜力.

研究的目的:

设计和合成新的可降解PSA,在应用过程中提供高性能.
为了使有效的网络降解后使用,促进更容易回收含PSA的产品.

主要方法:

激素共聚化n-丁烯酸盐与光交叉链接剂 (4-acryloyloxy benzophenone,ABP) 和一种可降解的硫成分 (dibenzo[c,e]oxepin-5(7H) - thione,DOT).
优化ABP和DOT的牙含量,以达到所需的接和剥离强度.
通过氨解和硫解评估网络可降解性,评估溶解和粘合性质的丧失.

主要成果:

最佳性能是在0.05mol%ABP和0.25mol%DOT的情况下实现的.
通过氨解或硫解降解导致网络完全溶解.
粘合膜在降解后的粘合强度和剥离强度显著下降.
模型标签表明,在网络退化后,从基板迅速脱离.

结论:

将二[c,e]氧-5(7H) - (DOT) 纳入PSA中会产生可降解的酸骨干.
这些可降解的PSA在使用过程中保持着重要的粘合性质.
开发的PSA为可回收包装标签提供了有希望的解决方案,解决了当前的回收挑战.

关键词:

可降解的聚合物聚合物聚合物聚合物激进环开放聚合方式回收回收是回收的过程.

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