Scholarlink

<p>The development of sustainable polymers is of great importance. The recyclability of thermoplastic materials has increased a lot over the past years, however, there is still a lack of efficient degradation of crosslinked materials. Therefore, we developed an epoxy-based rubber, consisting of a carboxylic acid end group functionalized polyester from oxalic acid and 1,5-pentandiol, cured with butanedioldiglycidylether (BDDE). The curing process was monitored by FT-IR spectroscopy and it was found that the curing reaction was only possible, in the presence of <i>para</i>-toluenesulfonic acid (<i>p</i>-TsOH). Furthermore, the thermal properties were analyzed by differential scanning calorimetry (DSC). By addition of the catalyst, curing could be carried out at only 55 ℃ in 16&#xa0;min for an epoxy/acid ratio of 1/2. Due to the incorporation of hydrolysis-sensitive ester moieties into the cross-linked polymer network, the degradability could be improved. Degradability tests were performed in pure water or in NaOH solutions and the degradation was monitored by gravimetric measurements. The results showed that the hydrolytic cleavage of ester groups enables efficient and rapid degradation of the network, already in water after 48&#xa0;h.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Development of a water-degradable epoxy resin for sustainable applications

  • 期刊论文

  • 发表日期：

    2025年8月5日

查看全文
  • Bernhard Sölle,
  • Szymon Gaca,
  • Gregor Trimmel,
  • Elisabeth Rossegger

摘要

The development of sustainable polymers is of great importance. The recyclability of thermoplastic materials has increased a lot over the past years, however, there is still a lack of efficient degradation of crosslinked materials. Therefore, we developed an epoxy-based rubber, consisting of a carboxylic acid end group functionalized polyester from oxalic acid and 1,5-pentandiol, cured with butanedioldiglycidylether (BDDE). The curing process was monitored by FT-IR spectroscopy and it was found that the curing reaction was only possible, in the presence of para-toluenesulfonic acid (p-TsOH). Furthermore, the thermal properties were analyzed by differential scanning calorimetry (DSC). By addition of the catalyst, curing could be carried out at only 55 ℃ in 16 min for an epoxy/acid ratio of 1/2. Due to the incorporation of hydrolysis-sensitive ester moieties into the cross-linked polymer network, the degradability could be improved. Degradability tests were performed in pure water or in NaOH solutions and the degradation was monitored by gravimetric measurements. The results showed that the hydrolytic cleavage of ester groups enables efficient and rapid degradation of the network, already in water after 48 h.

Graphical abstract