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首页> 外文期刊>Journal of Applied Polymer Science >Tunable elasticity and thermodynamic parameters of hydroxypropyl methacrylate-based gels with varying extents of monomer concentration: Statistical mechanics treatments of physical observations
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Tunable elasticity and thermodynamic parameters of hydroxypropyl methacrylate-based gels with varying extents of monomer concentration: Statistical mechanics treatments of physical observations

机译：甲基丙烯酸羟丙基甲酸甲基丙烯酸甲酯的可调谐弹性和热力学参数，单体浓度不同范围：物理观测的统计力学处理

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摘要

The present article reports the scaling laws relating the preparation conditions with the equilibrium swelling degree and the crosslinking density of a new family of hydroxyl functional hydrogels (Hgs) prepared by free radical crosslinking polymerization of hydroxypropyl methacrylate (HPMA) in aqueous solution with tetraethylene glycol dimethacrylate (TEGDMA) as crosslinker. For comparison of physical properties, chemical and mechanical stability, HPMA cryogels (Cgs) were also prepared using the cryotropic gelation technique by conducting the gelation reactions at subzero temperatures. The measurements of the equilibrium swelling degree and the elastic properties of poly(hydroxypropyl methacrylate) (PHPMA) gel samples having different initial monomer concentration were treated according to the scaling theory to explain the rubbery behavior of the resulting Hgs. The obtained scaling relation between the reduced modulus and the swelling degree G(r) approximate to (V-eq)(-48) indicated limiting chain extensibility which is neglected in the Flory-Rehner theory. The effective crosslink density and polymer-solvent interaction parameter of PHPMA Hgs were used to interpret the observed deviation. Results showed that the properties of PHPMA Hgs and Cgs can be controlled by varying the HPMA and TEGDMA content. Increase of total monomer concentrations causes a pronounced decrease in the equilibrium swelling degree, and an increase in the elastic response of PHPMA Hgs and Cgs. (C) 2017 Wiley Periodicals, Inc.
机译：本文章报道有关与平衡制备条件溶胀度的缩放法律和通过在水溶液中甲基丙烯酸羟丙酯（HPMA）的自由基交联聚合制备的羟基官能水凝胶（HGS）的一个新的家庭的四甘醇二甲基丙烯酸酯的交联密度丙烯酸酯（TEGDMA）作为交联剂。的物理性质，化学和机械稳定性，比较了通过进行在零度以下的凝胶化反应中使用cryotropic凝胶化技术还制备HPMA冷冻凝胶（CGS）。具有不同的初始单体浓度平衡溶胀度的测量和聚的弹性特性（羟丙基丙烯酸甲酯）（PHPMA）凝胶样品根据缩放理论来解释所得到的HGS的橡胶的行为治疗。 （ - 48）的降低的弹性模量和溶胀度G（r）的近似至（V-当量）之间所获得的标度关系表示限制其在弗洛里 - Rehner理论忽略链可扩展性。有效的交联密度和PHPMA HGS的聚合物 - 溶剂相互作用参数被用来解释所观察到的偏差。结果表明，PHPMA HGS和CGS的性质可通过改变HPMA和TEGDMA含量来控制。总单体浓度的增加引起的平衡溶胀程度的显着降低，并增加了PHPMA HGS和CGS的弹性响应。 （c）2017 Wiley期刊，Inc。

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