An improvement in the preparation of the reactive ladderlike polyhydrosilsesquioxane
文献类型：期刊论文
| 作者 | Duan, QH; Deng, KL; Zhang, TY; Zhang, XJ; Xie, P; Zhang, RB |
| 刊名 | ACTA POLYMERICA SINICA
 |
| 出版日期 | 2004-12-01 |
| 期号 | 6页码:898-902 |
| 关键词 | Ladder-like Polyorganosilsesquioxane (Lps) Polyhydrosilsesquioxane Self-assembly Stepwise Coupling Polymerization (Scp) |
| ISSN号 | 1000-3304 |
| 英文摘要 | An ordered reactive ladderlike polyhydrosilsesquioxane ( H-T) was successfully synthesized via a modified "stepwise coupling polymerization" process, which included two improvements in synthetic method. First, dehydrochlorination polycondensation between Si-OH and Si-Cl groups during polycondensation reaction is employed instead of the dehydration between Si-OH groups used before, which improves the H-bonding template effect of the bridged-phenylene diamine. Meanwhile, trimethylchlorosilane is used to block the terminal silanol groups, avoiding the further intermolecular crosslinking of the phenylene diamine-bridged ladderlike macromolecular intermediates. Consequently, the regularity of H-T has been improved, and compared with a very low T-g (- 123degreesC) of the single-chained polydimethylsiloxane, a significantly higher T-g (117.0degreesC) of H-T in DSC measurement confirms that the ordered reactive H-T macromolecule possesses comparatively stiff main chain. Above all, the peak of HSiO3/2 (- 84.8) with the baseline width (Delta) of about 5 in Si-29-NMR spectrum which is much narrower than that of the polysilsesquioxane (Delta = 8 similar to 10) prepared by the usual dehydration condensation method shows that the regularity of H-T is obviously improved. Furthermore, H-T is the first soluble, reactive and purely inorganic ladderlike macromolecule, which can be grafted through hydrosilylation reaction and others to generate functional LPSs with different side groups. |
| 语种 | 英语 |
| WOS记录号 | WOS:000226036900022 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/55121]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Duan, QH |
| 作者单位 | Chinese Acad Sci, Inst Chem, Joint Lab Polymer Sci & Mat, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Duan, QH,Deng, KL,Zhang, TY,et al. An improvement in the preparation of the reactive ladderlike polyhydrosilsesquioxane[J]. ACTA POLYMERICA SINICA,2004(6):898-902. |
| APA | Duan, QH,Deng, KL,Zhang, TY,Zhang, XJ,Xie, P,&Zhang, RB.(2004).An improvement in the preparation of the reactive ladderlike polyhydrosilsesquioxane.ACTA POLYMERICA SINICA(6),898-902. |
| MLA | Duan, QH,et al."An improvement in the preparation of the reactive ladderlike polyhydrosilsesquioxane".ACTA POLYMERICA SINICA .6(2004):898-902. |
入库方式： OAI收割
来源：化学研究所
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