Dynamic mechanical properties of multiphase acrylic systems
Dynamic mechanical properties of multiphase acrylic systems
复制标题
多相丙烯酸体系的动态机械性能
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
H. Øysæd
中科院分区：
文献类型：
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作者：
H. Øysæd
本文研究了五种二甲基丙烯酸酯交联剂的种类和用量对丙烯酸酯多相体系动态力学性能的影响。这些材料通常用于生物工程，通过液体甲基丙烯酸酯单体和聚（甲基丙烯酸甲酯）粉末的混合物的聚合来加工。在单体液体中用各种比例的甲基丙烯酸甲酯和二甲基丙烯酸酯交联剂制备试样。使用两种不同的加工条件，在100 ℃下热聚合和在45 ℃下自聚合。通过使用强制扭转振动装置，在-60 ℃至140 ℃的温度范围内，在0.1、1.0、10和100 rad/s的频率下测定储能模量（G ′）、损耗模量（G ″）和耗散因子（tan δ）。在自聚合的材料中，通过tan δ数据测定的玻璃化转变温度（Tg）随着交联剂量的增加而增加。储能模量同样增加。在热聚合材料中，仅观察到模量和tan δ随交联剂的类型和量的微小变化。在所有情况下，热聚合材料的Tg值均大于自聚合材料的Tg值。
: The influence of type and quantity of five different dimethacrylate crosslinking agents on the dynamic mechanical properties of multiphase acrylic systems has been studied. These materials, commonly used in bioengineering, were processed by polymerization of a mixture of liquid methacrylate monomers, and poly(methyl methacrylate) powder. The specimens were made with various ratios of methyl methacrylate and dimethacrylate crosslinking agents in the monomer liquid. Two different processing conditions were used, heat-polymerization at 100 degrees C and autopolymerization at 45 degrees C. By using a forced torsional vibration apparatus the storage modulus (G'), loss modulus (G"), and dissipation factor (tan delta) were determined over the temperature range -60 degrees C to 140 degrees C at frequencies of 0.1, 1.0, 10, and 100 rad/s. In the autopolymerized materials, the glass transition temperature (Tg), as determined via tan delta data, increased with increasing quantities of crosslinking agents. The storage modulus likewise increased. In the heat-polymerized materials only minor variations in modulus and tan delta with type and quantity of crosslinking agents were observed. Tg values of the heat-polymerized materials were, in all cases, greater than those of the autopolymerized materials.