摘要
以空气为等离子体反应气体对聚丙烯(PP)样板表面进行常压低温等离子体处理,分别采用光学显微镜、电晕笔、傅里叶变换红外光谱分析表征了处理后PP样板的表面形貌、表面润湿张力以及表面基团类型。将处理后PP样板与聚氨酯粘合剂以及聚氯乙烯(PVC)皮革复合制得PP/PVC复合板,测试了三者之间的粘结强度,并对粘结强度产生的机理进行了分析。研究表明,通过调整等离子体处理工艺,可以获得表面形貌无损的PP样板;表面无损PP样板的表面润湿张力相较于未处理样板仅由28 mN/m提高至31 mN/m,但粘结强度由40 N/m提升至809 N/m;表面无损PP样板表面的酰胺基团与粘合剂中的异氰酸根之间的化学键作用是粘结强度产生的根本原因;增加表面无损PP样板可与粘合剂反应的表面基团含量,能有效提升表面无损PP材料与粘合剂之间的粘结强度。
Polypropylene(PP)boards were treated by atmospheric pressure cold plasma using air as the reactive gas.The surface morphology,surface wetting tension and surface polar groups of PP boards were characterized by optical microscope,dyne test pens,and Fourier transform infrared spectroscopy,respectively.The treated PP boards and polyurethane adhesive as well as polyvinyl chloride(PVC)leather were combined for preparing PP/PVC composite board.Adhesion strength of the board was tested and the adhesion generating mechanism was analyzed.The results show that non-surface damaged PP boards can be obtained by regulating the plasma treating conditions.Additionally,compared with the untreated PP boards,the surface wetting tension of non-surface dam-aged PP boards only increases from 28 mN/m to 31 mN/m,but the adhesion strength increases from 40 N/m to 809 N/m.Besides,the chemical bonding between the amide group on the surface of non-surface damaged PP boards and isocyanate of adhesive is the key issues to increase the adhesion strength.At the same time,much stronger adhesion force of non-surface damaged PP can be achieved by increasing the reactive groups between non-surface damaged PP boards and adhesive.
作者
李国明
唐颂超
左立增
孙刚
陈延安
Li Guoming;Tang Songchao;Zuo Lizeng;Sun Gang;Chen Yan’an(Shanghai Kingfa Science&Technology Development Co.,Ltd.,Shanghai 201714,China;School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;Shanghai Engineering Research Center of Functionalizing Engineering Plastics,Shanghai 201714,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2022年第1期116-121,共6页
Engineering Plastics Application
关键词
表面无损
常压低温等离子体
聚丙烯
润湿张力
化学键作用
粘结强度
non-surface damage
atmospheric pressure cold plasma
polypropylene
wetting tension
chemical bonding
adhesion strength
