The Hygrothermal Effects on the Creep Behavior of Plastic Pin

• Main Authors: Yang, Chun-Ming, 楊浚銘
• Other Authors: 陳鴻雄
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/06221317827060568957

碩士 === 正修科技大學 === 機電工程研究所 === 98 === Pins are usually used to install the components of electronic products, for the insulation purpose, Nylon 66 is considered to be the most appropriate material. Nylon 66 can easily absorb water which would affect the strength, toughness and creep behaviors of the material. However, these behaviors will affect the pins performance. Creep behavior of Nylon 66 is also very sensitive to the temperate, this study is to evaluate the effects of the factors, environmental temperature, water absorption and duration of cryogenic treatment, on the creep behavior of pins through Taguchi methodology where the choice of cryogenic treatment is the first time forever in this study. The results show that the temperature and water absorption are the major factors in affecting the creep strain of Nylon 66 plastic pins. Under 80˚C temperature, with 5% water absorption and above, without cryogenic treatment, the highest creep strain after 24 hours is reached to 1.113%. The interaction between the temperature and the water absorption shows that both are the main factors of the creep strain in the primary creep stage. As for the secondary creep stage, temperature is the main factor. Moreover, the effect of cryogenic treatment on the creep strain of Nylon 66 plastic pins is not significant. Further studies need to be conducted to verify whether the duration of cryogenic treatment might be insufficient.