Development and characterization of degradable thiol-allyl ether photopolymers
Development and characterization of degradable thiol-allyl ether photopolymers
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DOI：
10.1016/j.polymer.2007.05.063
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发表时间：
2007-07-13
期刊：
影响因子：
4.6
通讯作者：
Bowman, Christopher N.
中科院分区：
文献类型：
--
作者：
Rydholm, Amber E.;Reddy, Sirish K.;Bowman, Christopher N.
通过自由基介导步生长反应形成了可降解的硫醇-烯光聚合物网络。网络结构的变化被用来改变初始和时间模数、质量损失分布和平衡溶胀率。质量损失率随溶剂浓度、单体相对分子质量、平均单体官能度和可降解键浓度的变化而变化。完全降解所需时间为1.2 0±0.0 1天~2 4.5±0.1天，对应的水解率分别为0.18±0.0 1天和0.021±0.0003天(-1)。初始模数随着网络结构的变化也有很大变化，从150+/-35到近5000+/-100kPa.初始平衡溶胀比从2.5-0.01到18.7+/-2.总之，这些结果表明，硫醇-烯网络的材料性质和质量损失行为可以根据具体的应用而独立地进行调节.(C)2007爱思唯尔有限公司。保留所有权利。
Degradable thiol-ene photopolymer networks were formed through radically mediated step-growth reactions. Variations in the network structure were used to alter the initial and temporal moduli, mass loss profiles, and equilibrium swelling ratios. Mass loss rates varied with changes in the solvent concentration, monomer molecular weight, average monomer functionality, and concentration of degradable linkages. The time required for the networks to degrade completely ranged from 1.20 +/- 0.01 to 24.5 +/- 0.1 days, which corresponded to hydrolysis rates of 0.18 +/- 0.01 and 0.021 +/- 0.0003 day(-1). Initial moduli also varied considerably as a function of network structure, ranging from 150 +/- 35 to nearly 5000 +/- 100 kPa, and initial equilibrium swelling ratios ranged from 2.5 0.01 to 18.7 +/- 2. Collectively, these results demonstrate how the material properties and the mass loss behavior of thiol-ene networks can be independently tuned for specific applications. (c) 2007 Elsevier Ltd. All rights reserved.