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현탁중합에 의한 폴리스티렌 입자의 크기

Particle Size of Suspension Polymerized Polystyrene Beads

김학령 김호기

Kim H Kim H

HWAHAK KONGHAK, February 1977, 15(1), 51-59(9), NONE

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Abstract

스티렌의 현탁중합을 위한 회분식 각반조내에서 현탁계의 물성이나 기계적 각반이 중합체의 크기와 입도분포에 주는 영향에 관해 실험적으로 고찰하였다. Polyvinyl Alcohol （PVA）를 현탁안정제로, Benzoyl Peroxide (BPO)를 개시제로 사용하여 상압, 90 ℃의 조건하에서 중합반응을 시켰을 때 다음과 같은 결론을 얻었다.
（1） 평균입도는 각반속도가 증가함에 따라 다음 식에 의하여 감소하는 것이 나타났다(터빈형임펠라의 경우) log d=-0.00070 (ND)+0.97
（2） 프로펠라형 임펠라를 사용했을 때가 터빈형의 것을 사용했을 때보다 넓은 입도분포를 나타냈다.

The effects of the stirring rate and the stabilizer concentration on the particle size of the suspension polymerized polystyrene were experimentally investigated. The reaction was carried out in an unbaffled mixing vessel with benzoyl peroxide as the initiator and polyvinyl alcohol as the stabilizer. The measurement of the product particle size by standard sieves showed that : （1） The average particle size decreased with the increase in stirring rate according to the following relationship,
log d=-0.00070 （ND）+0.97
and （2） The propeller type impeller produced the products with broader size distributions than the turbine type impeller of the same dimension.

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