Elastomers and Composites
- Volume 31 Issue 2
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- Pages.104-110
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- 1996
- /
- 2092-9676(pISSN)
- /
- 2288-7725(eISSN)
A Study on the Physical Properties and Adhesion Characteristics of Polyurethane Resin
폴리우레탄 수지의 물성 및 접착특성에 관한 연구
- Kim, Young-Joon (Korea Institute of Footwear & Leather Technology) ;
- Chang, Ki-Young (Korea Institute of Footwear & Leather Technology) ;
-
Kim, Gu-Ni
(Korea Institute of Footwear & Leather Technology) ;
- Chun, Yong-Chul (Korea Institute of Footwear & Leather Technology) ;
-
Yoo, Chong-Sun
(Korea Institute of Footwear & Leather Technology) ;
- Park, Sang-Wook (Korea Institute of Footwear & Leather Technology)
- 김영준 (한국신발.피혁연구소) ;
- 장기영 (한국신발.피혁연구소) ;
-
김구니
(한국신발.피혁연구소) ;
- 전용철 (한국신발.피혁연구소) ;
-
유종선
(한국신발.피혁연구소) ;
- 박상욱 (한국신발.피혁연구소)
- Published : 1996.05.30
Abstract
The polyurethane was synthesized by the reaction of polycaprolactone diol(Mw 2000), 4,4'-diphenylmethane diisocyanate and 1,4-butanediol as the chain extender. Also, the modified polyurethane polymers based on liquid polybutadiene as a part of soft segment and dimethylolpropionic acid as a chain extender, giving polyurethane with various polarity, were synthesized. The thermal, mechanical, adhesion properties and water contact angles of the polyurethanes were examined. From the result of the water contact angle, the polarity of the acid modified PU containing 6% acid content was unchanged but mechanical and adhesion properties were improved. The water contact angles on polybutadiene modified PU films were increased with increasing polybutadiene content. The mechanical properties of the polybutadiene modified PU were higher than that of acid modified PU. However, the mechanical properties were reduced as polybutadiene content increased. The result is presumably due to phase separation between hard segment and soft segment. The peel strength of the polyurethane introduced with 5wt% polybutadiene was improved about 150% than that of unmodified PU. The same as the mechanical properties, the more polybutadiene was introduced, the lower peel strength was obtained.
Keywords