| 刘亚兰 雷忠利.PAN- b- PEG- b- PAN 两亲性嵌段共聚物的合成及热稳定性[J].现代生物医学进展英文版,2006,6(6):16-19. |
| PAN- b- PEG- b- PAN 两亲性嵌段共聚物的合成及热稳定性 |
| Study on Synthesis of PAN- b- PEG- b- PAN Amphiphilic BlockCopolymers and the thermal stabilities |
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| DOI： |
| 中文关键词: 原子转移自由基聚合 两亲性嵌段共聚物 合成 热稳定性 |
| 英文关键词: Atom Transfer Radical Polymerization ( ATRP) Amphiphilic Block Copolymers Sythesis Thermal Stabilities |
| 基金项目:陕西省科技计划资助项目( No. 2004K07- G14) 。 |
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| 中文摘要: |
| 以2- 溴丙酰溴封端的聚乙二醇( PEG2000) 为大分子引发剂, 溴化亚铜( CuBr) 为催化剂, 2, 2. - 联吡啶( bpy) 为配体, 碳
酸乙烯酯( EC) 为溶剂, 采用原子转移自由基聚合( ATRP) 法合成了两亲性嵌段共聚物PAN- b- PEG- b- PAN。通过FTIR、1H
NMR 和GPC 对产物的结构进行了表征, 并运用TGA 对PAN- b- PEG- b- PAN 两亲性嵌段共聚物的热稳定性进行了研究。结果
表明: PAN- b- PEG- b- PAN 的热稳定性较纯PEG 要高, 且随着PAN- b- PEG- b- PAN 两亲性嵌段共聚物的分子量的增加, 此
嵌段共聚物的热稳定性增强。它的起始的分解温度为275e , 在275e - 450 e 失重较少, 失重率约为15%, 在400 e - 450 e 迅速
分解, 失重率为60%左右。 |
| 英文摘要: |
| Poly( ethylene glycol) with 2- Bromopropionyl bromine end group was used as macroinitiator, cupric bromide ( CuBr) as
the catalyst, 2, 2c- bipyridine ( bpy) as the ligand, ethylene carbonate ( EC) as a solvent, and the amphiphilic block copolymers of PAN- b-
PEG- b- PAN with controlled block length were synthesized using atom transfer radical polymerization ( ATRP) . The amphiphlic block copolymers
of PAN- b- PEG- b- PAN were characterized by using FTIR, 1H NMR and GPC. The results showed that the thermal stabilities of PAN
- b- PEG- b- PAN were higher than PEG( 2000) , and their thermal stabilities were enhanced with increasing the molecular weight of amphiphilic
blockcopolymers of PAN- b- PEG- b- PAN. The first decomposition temperature of them was 275e . The weight of PAN- b- PEG
- b- PAN was reduced by 15% at 275e - 450e . They were reduced quickly at 400 e - 450e and about 60% of PAN- b- PEG- b- PAN
was reduced. |
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