Suspension polymerization of poly(methyl methacrylate)

목차

1. Title

2. Principle

3. Apparatuses and Reagents

4. Procedure

5. Result

6. Error & cause

7. Discussion

8. Reference

본문내용

in the treatment of most forms of acne. It is typically placed over the affected areas in gel or cream form, in concentrations of 2.5% increasing through the usually effective 5% to up to 10%. Research suggests that 5 and 10% concentrations are not significantly more effective than 2.5% and 2.5% is usually better tolerated.[1][2] It commonly causes initial dryness and sometimes irritation, although skin tolerance usually occurs after a week or so. A small percentage of people are much more sensitive to it and liable to suffer burning, itching, peeling and possibly swelling[3]. It is sensible to apply the lowest concentration and build up as appropriate. Once tolerance is achieved, increasing the quantity or concentration a second time and gaining tolerance at a higher level usually gives better subsequent acne clearance. Benzoyl peroxide works as a peeling agent, increasing skin turnover and clearing pores, thus reducing the bacterial count there as well as directly as an antibacterial.
8. Reference
http://www.polymer.pusan.ac.kr/lab1/macrogalleria/pmma.html
http://www.dongseo.ac.kr/dsu2001/cyber-study/ccpark/homepage/chem3/mma.htm
http://kr.encycl.yahoo.com/final.html?id=17331

키워드

현탁중합,   PMMA,   poly(methyl methacrylate),   Suspension polymerization