摘要
为了提高聚乙烯板材的粘接性能,分别用火焰和空气等离子体处理方法对聚乙烯板材试样表面进行处理,根据拉伸剪切强度确定最佳处理工艺。采用傅立叶变换红外光谱、X射线光电子能谱、扫描电子显微镜、能谱仪、接触角检测等手段分析试样表面处理前后的化学组成、形貌、润湿性。结果表明,火焰处理最佳工艺条件:试样未打磨,处理距离1cm,处理速率0.625cm/s;空气等离子体处理最佳工艺条件:试样未打磨,放电功率500W,气体压力0.06MPa,放电气体为空气,处理距离1.5cm,处理时间4s。表面处理能够去除试样表面的弱边界层,引入含氧极性基团羟基和羧基,提高表面化学活性。经过火焰或空气等离子体处理的试样表面接触角分别降低为91.04°和22.43°,润湿性能得到改善。两种表面处理方法都能够明显提高试样的粘接性能。其中天山1956胶粘剂粘接火焰处理的未打磨试样,其拉伸剪切强度最大可达到4.063MPa,破坏方式为粘附破坏。
In order to enhance the bonding properties of polyethylene sheets,flame and air plasma treatment were conducted, the optimum treatment process was determined by tensile shear strength. The results are correlated with the surface composition, morphology and wettability,which are detected by FTIR,SEM,EDS,XPS and contact angle. Optimum processing conditions for flame treatment :unpolished sample,treatment distance 1 cm,treatment rate 0.625 cm/s. Optimum processing conditions for air plasma treatment :unpolished sample,discharge power 500 W,gas pressure 0.06 MPa,discharge gas air,treatment distance 1.5cm, treatment time 4s. The results show that the surface treatment can remove the weak interface layer and introduces polar groups such as hydroxyl and carbonyl group,which can obviously improve the surface chemical activity. After flame or air plasma treatment,the surface contact angle of the sample decreased to 91.04° and 22.43° respectively. The wettablility and the bonding properties of sample can be improved obviously by these surface treatment methods. The maximum tensile shearing strength of sample that bonded with Tianshan 1956 after flame treatment is 4.063 MPa,the destructive mode is adhesion destruction.
作者
赵辉
王静
谢梅竹
耿树江
Zhao Hui;Wang Jing;Xie Meizhu;Geng Shujiang(CRRC Tangshan Co., Ltd., Tangshan 063035, China;School of Metallurgy, Northeastern University,Shenyang 110819, China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2019年第1期60-66,共7页
Engineering Plastics Application
关键词
聚乙烯
火焰处理
空气等离子体处理
粘接性能
胶粘剂
polyethylene sheet
flame treatment
air plasma treatment
adhesion property
adhesive
