Composting a Sticky Problem: Synthesis and Degradation of Isosorbide-Derived Hot-Melt Adhesive

IF 7.4 2区化学 Q1 POLYMER SCIENCE

Polymer Degradation and Stability Pub Date : 2025-08-20 DOI:10.1016/j.polymdegradstab.2025.111617

Kyeong Mi Kim , Dong Ki Hwang , Huijeong Park , Hyo Jeong Kim , Jeyoung Park , Dongyeop X Oh , Sung Bae Park , Hyeonyeol Jeon , Jun Mo Koo

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引用次数: 0

Abstract

The accumulation of nondegradable plastics in the environment exacerbates the severity of plastic pollution, and adhesives such as hot melts are no exception. In multilayer plastic products, hot-melt layers are inserted between plastic films to provide functionality and adhesion: however, these adhesives reduce the overall degradability of the product and adversely affect the physical and chemical biodegradation process, even if the underlying substrate is biodegradable. Given the wide range of its industrial applications, transitioning from petroleum-based hot-melt adhesive components to biomass-based alternatives that maintain adequate mechanical properties is essential. In this context, we introduce a novel biodegradable hot-melt adhesive system based on poly(1,4-cyclohexanedimethylene-co-isosorbide succinate-co-citrate) (PCISC), a complex polyester derived from isosorbide. This system incorporates biomass-derived monomers and demonstrates a high adhesion of 5.2 MPa, similar to that of conventional hot-melt adhesives. The structure of the PCISC with such a high adhesion is evaluated through rheological analysis, and the transition of the adhesive component upon curing is identified using two-dimensional correlation spectroscopy. The high adhesion is the result of a combination of factors, including the mobility of flexible components (1,4-cyclohexanedimethanol and succinic acid), the formation of a 3D network through crosslinking of rigid components (citric acid), and partial charge interactions between the oxygen-containing moieties in isosorbide and the substrate. Degradation and composting experiments using biodegradable poly(lactic acid) as a substrate demonstrate the potential of the PCISC as a successful alternative to conventional hot-melt adhesives.

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堆肥的一个棘手问题：异山梨酯衍生热熔胶的合成与降解

不可降解塑料在环境中的积累加剧了塑料污染的严重程度，热熔胶等粘合剂也不例外。在多层塑料产品中，热熔胶层插入塑料薄膜之间以提供功能和附着力：然而，这些粘合剂降低了产品的整体可降解性，并对物理和化学生物降解过程产生不利影响，即使底层基材是可生物降解的。鉴于其广泛的工业应用，从石油基热熔胶组件过渡到保持足够机械性能的生物质基替代品是必不可少的。在此背景下，我们介绍了一种新型可生物降解的热熔胶体系，该体系基于聚（1,4-环己二亚甲基-琥珀酸异山梨酯-柠檬酸酯）（PCISC），一种由异山梨酯衍生的复合聚酯。该系统包含生物质衍生单体，并显示出5.2 MPa的高附着力，与传统热熔胶相似。通过流变学分析评估了具有如此高附着力的PCISC的结构，并使用二维相关光谱识别了固化时粘合剂成分的转变。高粘附性是多种因素共同作用的结果，包括柔性组分（1,4-环己二甲醇和琥珀酸）的迁移性，刚性组分（柠檬酸）通过交联形成的3D网络，以及异山梨酯中含氧部分与底物之间的部分电荷相互作用。使用可生物降解聚乳酸作为基质的降解和堆肥实验表明，PCISC作为传统热熔胶的成功替代品的潜力。

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.