| EFFECT OF POLYMERIZATION CONDITIONS ON THE MOLECULAR WEIGHT OF POLYPHENYLSILSISQUIOXANE |
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| 作者姓名： | 李桂芝 叶美玲 施良和 |
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| 作者单位： | Polymer Physics Laboratory，Institute of Chemistry，Academia Sinica，Beijing 100080，Polymer Physics Laboratory，Institute of Chemistry，Academia Sinica，Beijing 100080，Polymer Physics Laboratory，Institute of Chemistry，Academia Sinica，Beijing 100080 |
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| 基金项目： | This work was supported by the grants from the National Natural Science Foundation of China and the Polymer Physics Laboratory,Academia Sinica. |
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| 摘 要： | Samples of polyphenylsilsisquioxane (PPSQ)using CaF_2 or MgF_2 as the main catalysts hadbeen prepared under different polymerization conditions. The results were treated on anorthogonal design L_9 (3~4). All weight-average molecular weights (M_W ) of PPSQ had beenmeasured by gel permeation chromatography (GPC). Effects of polymerization conditionsincluding reaction temperature, composition of the dual catalysts (CaF_2 or MgF_2 and DCC),mixture of solvents and reaction time on M_W of PPSQ have been discussed. The quantity of thecatalysts is the most important factor that affects M_W of PPSQ. Reaction temperature is thesecond important factor. Appropriate polymerization condition has been established to get PPSQwith high M_W.
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| 收稿时间： | 1993-11-20 |
EFFECT OF POLYMERIZATION CONDITIONS ON THE MOLECULAR WEIGHT OF POLYPHENYLSILSISQUIOXANE* |
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| LI Guizhi,YE Meiling,SHI Lianghe.EFFECT OF POLYMERIZATION CONDITIONS ON THE MOLECULAR WEIGHT OF POLYPHENYLSILSISQUIOXANE[J].Chinese Journal of Polymer Science,1994,0(4):331-336. |
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| Authors: | LI Guizhi YE Meiling SHI Lianghe |
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| Institution: | Polymer Physics Laboratory; Institute of Chemistry; Academia Sinica; Beijing |
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| Abstract: | Samples of polyphenylsilsisquioxane (PPSQ)using CaF_2 or MgF_2 as the main catalysts hadbeen prepared under different polymerization conditions. The results were treated on anorthogonal design L_9 (3~4). All weight-average molecular weights (M_W ) of PPSQ had beenmeasured by gel permeation chromatography (GPC). Effects of polymerization conditionsincluding reaction temperature, composition of the dual catalysts (CaF_2 or MgF_2 and DCC),mixture of solvents and reaction time on M_W of PPSQ have been discussed. The quantity of thecatalysts is the most important factor that affects M_W of PPSQ. Reaction temperature is thesecond important factor. Appropriate polymerization condition has been established to get PPSQwith high M_W. |
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| Keywords: | Polyphenylsilsisquioxane Polymerization conditions Molecular weight |
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