Dynamic microprobing of viscoelastic polymer properties
Dynamic microprobing of viscoelastic polymer properties
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DOI：
10.1002/(sici)1097-0126(200005)49:5
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发表时间：
2000-05
影响因子：
3.2
通讯作者：
V. Tsukruk;Valery V Gorbunov;Zheng Huang;S. Chizhik
中科院分区：
文献类型：
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作者：
V. Tsukruk;Valery V Gorbunov;Zheng Huang;S. Chizhik
扫描力显微镜 (SFM) 用于探测聚异戊二烯橡胶、聚氨酯、聚苯乙烯和聚氯乙烯的微观机械性能。 SFM 悬臂在微探测中的适用性被认为是一种方便的材料选择方法。弹性接触的赫兹模型用于获得接触频率范围 0.05-367 Hz 的杨氏模量。弹性模量的绝对值与散装材料的已知特性相关，对于空气中的玻璃状聚氯乙烯和聚苯乙烯没有检测到频率依赖性。橡胶和聚氨酯的杨氏模量的时间依赖性遵循 Williams-Landel-Ferry 关系，其参数对于散装材料而言是已知的。对于水中的 PVC，记录了弹性模量的显着降低和强烈的时间依赖性。由于溶剂分子对最上面聚合物层的塑化作用，这种行为可能与较低的局部玻璃化转变温度有关。 #2000年化学工业学会
Scanning force microscopy (SFM) was used to probe the micromechanical properties of polyisoprene rubbers, polyurethanes, polystyrene and polyvinylchloride. Applicability of the SFM cantilevers for microprobing is presented as a convenient method for materials selection. The Hertzian model of elastic contacts was used to obtain Young's modulus at contact frequencies range 0.05-367 Hz. The absolute values of the elastic modulus were correlated with the known properties of bulk materials, with no frequency dependence detected for glassy polyvinylchloride and polystyrene in air. The time dependence of the Young's modulus of rubber and polyurethanes followed the Williams-Landel-Ferry relationship, with parameters known for bulk materials. For PVC in water, a significant reduction of the elastic modulus and strong time-dependency were recorded. This behaviour can be related to the lower local glass transition temperature because of a plastification effect of solvent molecules on the uppermost polymer layer. # 2000 Society of Chemical Industry