Branched Multifunctional Polyether Polyketals: Variation of Ketal Group Structure Enables Unprecedented Control over Polymer Degradation in Solution and within Cells
作者:Rajesh A. Shenoi、Jayaprakash K. Narayanannair、Jasmine L. Hamilton、Benjamin F. L. Lai、Sonja Horte、Rajesh K. Kainthan、Jos P. Varghese、Kallanthottathil G. Rajeev、Muthiah Manoharan、Jayachandran N. Kizhakkedathu
DOI:10.1021/ja305080f
日期:2012.9.12
their backbone that exhibit unprecedented controlover degradation in solution and within the cells. High-molecular-weight and highly compact poly(ketal hydroxyethers) (PKHEs) were synthesized from newly designed α-epoxy-ω-hydroxyl-functionalized AB(2)-type ketal monomers carrying structurally different ketal groups (both cyclic and acyclic) with good controlover polymer properties by anionic ring-opening
多功能生物相容性和可生物降解纳米材料结合了特定的可降解连接,可响应各种刺激并具有明确的降解特征,对于靶向纳米医学的发展至关重要。在此,我们首次报告了一类新的多功能树枝状聚醚聚缩酮,其主链中含有不同的缩酮键,它们对溶液中和细胞内的降解表现出前所未有的控制。高分子量和高度紧凑的聚(缩酮羟基醚)(PKHEs)由新设计的带有结构不同缩酮基团(环状和非环状)的 α-环氧-ω-羟基官能化 AB(2) 型缩酮单体合成通过阴离子开环多支化聚合对聚合物性能进行良好控制。在没有缩酮基团降解的情况下实现了具有多个叠氮化物和胺基团的聚合物官能化。聚合物降解主要受主链中取代缩酮基团的结构差异和扭转应变的控制,而对于具有线性(无环)缩酮基团的聚合物,聚合物的疏水性可能起到额外的作用。这得到单体的 log P 值和使用芘作为探针的荧光光谱测定的聚合物疏水性的支持。聚合物在弱酸性 pH 值下的水解半衰期范围从几分钟到几百
Reactive coatings comprising an acid-functional compound, an anhydride-functional compound, an epoxy-functional compound and a hydroxy-functional compound
申请人:THE SHERWIN-WILLIAMS COMPANY
公开号:EP0316873A2
公开(公告)日:1989-05-24
Curable compositions which comprise:
(i) an acid-functional compound having an average of at least two carboxylic acid groups per molecule; and
(ii) an anhydride-functional compound having an average of at least two cyclic carboxylic acid anhydride groups per molecule; and
(iii) an epoxy-functional compound having an average of at least one epoxy group per molecule; and
(iv) a hydroxy-functional compound having an average of at least two hydroxyl groups per molecule;
wherein at least one of the compounds (i), (ii), (iii) or (iv) comprises a film forming polymer.
可固化组合物,其中包括
(i) 酸官能化合物,平均每个分子至少有两个羧酸基团;和
(ii) 酸酐官能团化合物,平均每个分子至少有两个环状羧酸酸酐基团;和
(iii) 每分子平均具有至少一个环氧基团的环氧官能团化合物;以及
(iv) 羟基官能团化合物,平均每个分子至少有两个羟基;
其中化合物(i)、(ii)、(iii)或(iv)中的至少一种包含成膜聚合物。
HARTKE, KLAUS;KUNZE, OLAF, LIEBIGS ANN. CHEM.,(1989) N, C. 321-330
作者:HARTKE, KLAUS、KUNZE, OLAF
DOI:——
日期:——
CURABLE COMPOSITIONS COMPRISING ACETOACETOXY AND IMINE FUNCTIONALITY
申请人:THE SHERWIN-WILLIAMS COMPANY
公开号:EP1135444A1
公开(公告)日:2001-09-26
THERMOPLASTIC/THERMOSET HYBRID FOAMS AND METHODS FOR MAKING SAME