The effects of the modification of stabilizer concentration and the phase ratio to monomer and water on the size of polymethyl methacrylate particles, and the relationships between the polymer particle diameter and molecular weight of polymer are evaluated by the suspension polymerization at 70℃ with 2,2''-azobisisobutyronitrile as initiator and polyvinyl alcohol as stabilizer. Average particle sizes of polymer products are diminished as the stabilizer concentrations are increased and are grown up with the increasing phase ratio. But any apparent influence on the particle size with the change of polymerization rate are not observed. It is suggested that RRS-particle size distribution equation is nicely applicable to the result from the present polymerization, and the products polymerized at the same conditions have the quite similar amounts of molecular weight regardless of how big or small the particle sizes are.

2,2''-azobisisobutyronitrile을 개시제로, poly(vinyl alcohol)을 안정제로 하는 70℃에서의 methyl methacrylate의 서스펜션 중합에서 안정제의 농도 및 단위체와 물의 체적비(phase ratio)의 변화가 생성 polymethyl methacrylate 입자의 입경에 미치는 영향, 입경과 생성중합물의 분자량의 관계를 고찰하였다. 생성중합물의 평균입경은 안정제의 농도가 커질수록 작아졌으며, phase ratio가 커질수록 커졌다. 그러나 안정제의 농도는 중합속도에는 거의 영향이 없었다.한편 본 실험에서 얻은 polymethyl methacrylate들에는 RRS-입자경분포식이 잘 적용되며, 동일한 서스펜션중합 조건하에서 생성된 중합물들은 입자경의 대소에 관계없이 같은 분자량을 가진다는 것을 알았다.