Characterization of fracture energy and toughness of air plasma PDMS-PDMS bonding by T-peel testing
Characterization of fracture energy and toughness of air plasma PDMS-PDMS bonding by T-peel testing
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DOI：
10.1080/01694243.2017.1406877
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发表时间：
2018-01-01
影响因子：
2.3
通讯作者：
Chen, Cheng-fu
中科院分区：
文献类型：
--
作者：
Chen, Cheng-fu
本文评估了空气等离子体氧化聚二甲基硅氧烷（PDMS）键合的断裂能、韧性和失效模式。每个 PDMS-PDMS 粘合样本均以恒定位移速率进行 T 剥离测试。利用线弹性断裂力学中的能量平衡原理对每次试验的载荷-延伸曲线进行分析，计算断裂能（临界应变能）和韧性（表面能），其中断裂能（临界应变能）是粘合样品在不失去其组装完整性的情况下可以承受的最大应变能，韧性（表面能）是界面处的粘合能。计算值与空气等离子处理参数的分布显示，断裂能的主要范围为 0.1 至 0.4 N/mm，韧性的主要范围为 0.1 至 0.2N/mm。结合对三种失效模式（内聚、粘合和混合）的分析，结果表明 0.1N/mm 作为弱粘合断裂能的阈值，低于该阈值，样品可能会因脱粘而失效。建议采用一组处理参数来使用空气等离子体来实现牢固的粘合。
The fracture energy, toughness and failure modes of air plasma oxidized polydimethylsiloxane (PDMS) bonding are evaluated in this paper. Each PDMS-PDMS bonded specimen was subjected to T-peel testing at a constant-displacement rate. The load-extension curve from each test was analyzed by the principle of energy balance in linearly elastic fracture mechanics, to calculate the fracture energy (critical strain energy), which is the maximal strain energy a bonded specimen can withstand without losing its assembly integrity, and toughness (surface energy), which is the bonding energy at the interface. A distribution of calculated values against the air plasma treatment parameters shows the predominant range of 0.1 to 0.4 N/mm for fracture energy and 0.1 to 0.2N/mm for toughness. Together with an analysis of three failure modes (cohesive, adhesive, and mixed), the results suggest 0.1N/mm as the threshold of the fracture energy for weak bonding, below which a specimen will be likely to fail through debonding. A set of treatment parameters are recommended for using air plasma to achieve strong bonding.