The Surface Grafting of A Thermoplastic Olefin Elastomer Under Plasma Exposure

• Main Authors: Ho, T. E., 何慈恩
• Other Authors: S. G. Hong
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/74194189422870388049

碩士 === 元智工學院 === 化學工程學系 === 84 === The plasma modification of a thermoplastic olefin elastomer（ TPO) surface was studied with the attenuated total reflection infrared spectroscopy （ATR）,the lap shear test, and the contact angle measurement. Both maleic anhydride (MA)and acrylic acid （AA） were grafted in the presence of benzophenone (BP), benzoyl peroxide（BPO）, or azobisisobutyronitrile（AIBN） initiators.ATR spectra confirmed that carbonyl, carboxyl, and amino groups were formed on theplasma treated TPO surface; MA and AA were also effectively TPO. The amountsgrafted increased with the treating time and changed with respect to the typeof initiator used. The total surface energies and the polar components ofthe treated TPO also increased with increasing the plasma exposure time,and followed in the order of BP > BPO > AIBN. However, the lap shear strength(LSS) decreased after a prolonged exposure and were dependent on the type ofmonomer and initiator applied. The greatest LSS was obtained from thespecimens prepared with TPO after only thirty seconds plasma treatment.The small differences in the surface energies but the great changes inthe lap shear strengths of various specimens implied that the nature of thegrafted layer had a profound effect on the adhesion strength. It is concluded that the properties of the grafted layers depended on the monomer, the initiator, and the exposure time used. (Keywords : thermoplastic olefin, plasma, grafting, attenuated total reflection infrared, surface energy)