Department of Mechanical Science and Engineering, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
Department of Chemistry, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA.
Macromol Rapid Commun. 2018 Jun;39(11):e1800046. doi: 10.1002/marc.201800046. Epub 2018 Apr 30.
Thermally triggerable polymer films that degrade at modest temperatures (≈85 °C) are created from a blend of cyclic polyphthalaldehyde (cPPA) and a polymeric thermoacid generator, poly(vinyl tert-butyl carbonate sulfone) (PVtBCS). PVtBCS depolymerizes when heated, generating acid which initiates the depolymerization of cPPA into volatile byproducts. The mass loss onset for 2 wt% PVtBCS/cPPA is 22 °C lower than the onset for neat cPPA alone in dynamic thermogravimetric analysis experiments. Increased concentrations of PVtBCS increase the rate of depolymerization of cPPA. Raman spectroscopy reveals that the monomer, o-phthalaldehyde, is the main depolymerization product of the acid-catalyzed depolymerization of cPPA. The PVtBCS/cPPA blend is a promising material for the design and manufacture of transient electronic packaging and polymers.
通过将环状聚邻苯二甲酸二烯丙酯（cPPA）与高分子热酸产生剂聚（叔丁基碳酸乙烯酯砜）（PVtBCS）共混，制备了在适中温度（≈85°C）下可降解的热响应性聚合物薄膜。当加热时，PVtBCS 会发生解聚，生成酸，从而引发 cPPA 解聚为挥发性副产物。在动态热重分析实验中，与纯 cPPA 相比，质量损失起始温度对于 2wt%PVtBCS/cPPA 低 22°C。增加 PVtBCS 的浓度会加快 cPPA 的解聚速率。拉曼光谱表明，邻苯二甲醛单体是 cPPA 在酸催化解聚过程中的主要解聚产物。PVtBCS/cPPA 共混物是设计和制造瞬态电子封装和聚合物的有前途的材料。
