I. 철강재료의 구분
1. 철강의 중요성
* 철강 : 전 금속 생산량의 95% 이상인 인공재료
철강공업은 전 산업의 소재 공급 기간산업
* 배경 : 1) 풍부한 자원 :
Clarke수 : 지각 중의 주요 원소의 존재 비율
2) 대량생산(약 7억 ton/년) ⇒ 가격 저렴
3) 강도 및 인성
Foam
<폴리우레탄 결합>
폴리우레탄 탄성체는 유리전이온도(Tg)가 실온 이하인 굴곡성이 풍부한 soft segment와 강한 분자간력에 의해 결정구조를 갖는 hard segment로 이루어진 블록 공중합체이다. 섬유를 신장하였을 때 soft segment는 길게 늘어나며 hard segment는 가교결합의 역할을 하여 분자사슬간의 미끄러
foam.
Five decaf lattes with a long straw.
Four caramel macchiattos.
Double up on the cup.
Two blueberry scones
with the little granules on top...
...and one Starbucks compilation CD.
No! I would like....
Whats going on? Wheres McDonald?
Could we put out an APB
on my Frappuccino?
Its in the bag. Did he say anything
about last night?
Relax. Dont annoy him.
Dont say anything. Dont argue.
I dont arg
reaction.
SEBASTIAN
(beat)
I am a goddamn genius.
He hits a few more keys and a telephone keypad appears on
the screen. He dials.
CUT TO:
INT. ANOTHER BEDROOM - NIGHT
Digital phone rings.
In the bed, LINDA FOSTER, late twenties, stirs from a
deep sleep. As she straggles out of bed and over to her
desk, we notice a young man sleeping next to her.
The ringing continues. She moves her computer mo
foam.
Five decaf lattes with a long straw.
Four caramel macchiattos.
Double up on the cup.
Two blueberry scones with the little granules on top...
...and one Starbucks compilation CD.
No! I would like....
Whats going on? Wheres McDonald?
Could we put out an APB on my Frappuccino?
Its in the bag. Did he say anything about last night?
Relax. Dont annoy him. Dont say anything. Dont argue.
I dont arg