Abstract:
본 발명은 구형의 고분자 입자로부터 편원형(oblate) 고분자 입자를 제조하는 방법으로서, 구형의 고분자 입자가 들어있는 고분자 필름을 압착(squeezing)하는 방법이다. 필름의 균일한 변형을 위해 두 개의 제 3 고분자 시트를 이용하였다. 본 발명은 이전에 소개된 편원형 고분자 입자를 제조하는 기술들에 비해 균일한 편원형 입자를 제조할 수 있으며, 수득률도 향상되었다.
Abstract:
The present invention relates to a polymer resin composition with cyanate ester resin and a curing catalyst, prepreg in which the polymer resin composition is impregnated into carbon fibers, and a carbon fiber-polymer composite with laminated prepreg. According to one embodiment of the present invention, the polymer-carbon fiber composite has improved heat resistance with a gas release rate of less than 1% at high temperature and high vacuum state using the cyanate ester resin and the cobalt catalyst and thermal decomposition temperature of 300 deg. C or higher and can be widely applied to electricity, electronics, semiconductor materials, and aerospace fields.
Abstract:
The present invention relates to a low temperature curing epoxy resin composition including 3-10 parts by weight of a curing agent, 1-10 parts by weight of a hardening accelerator, and 0.1-10 parts by weight of low temperature hardening accelerator based on 100 parts by weight of epoxy resin, to a prepreg using the low temperature curing epoxy resin composition, and to a low temperature polymer composite on which the prepreg is placed. According to the present invention, an epoxy resin composition curable at low curing temperature of 70-80°C can be manufactured. The resin in which the low temperature curing epoxy resin composition is cured is found to have most of the properties like tensile strength, tensile modulus, elongation to break, energy absorbed during break which are almost same as an existing high temperature curing resin cured product. Moreover, if a fiber reinforced prepreg is manufactured by soaking a fiber in the low temperature curing epoxy resin composition in the present invention, the shape is formed by placing the the fiber reinforced prepreg in an opened space, and if a heat energy is supplied in a heater or a heating mold having a hot wire inserted in a mold, a product having a large structure can be manufactured.