One-pot synthesis of POSS-containing alternating copolymers by RAFT polymerization and their microphase-separated nanostructures
One-pot synthesis of POSS-containing alternating copolymers by RAFT polymerization and their microphase-separated nanostructures
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DOI：
10.1039/c4py00302k
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发表时间：
2014-07
影响因子：
4.6
通讯作者：
Zhenghe Zhang;Lizhi Hong;Yun Gao;Weian Zhang
中科院分区：
文献类型：
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作者：
Zhenghe Zhang;Lizhi Hong;Yun Gao;Weian Zhang
通过可逆加成-断裂转移（RAFT）聚合一锅法合成了聚（苯乙烯-交替-马来酰亚胺异丁基POSS）（PSMIPOSS）交替共聚物。结果表明，通过马来酰亚胺-异丁基POSS与苯乙烯的交替共聚，成功地构建了一种具有高聚合度（DP）和低多分散指数（PDI）的含POSS的交替共聚物，且通过RAFT试剂的用量可以很好地控制PSMIPOSS交替共聚物的分子量。聚（苯乙烯-alt-马来酰亚胺-异丁基POSS）-嵌段-聚苯乙烯通过RAFT聚合一锅法制备了（PSMIPOSS-b-PS）嵌段共聚物，并通过透射电子显微镜（TEM）和小角X射线散射（SAXS）研究了其在本体中的自组装行为，发现POSS球发生了一系列短程有序相转变，POSS圆柱到薄片结构，MIPOSS的重量分数范围从13%到64%。用差示扫描量热法（DSC）和热重分析法（TGA）对含POSS共聚物的热性能进行了研究。结果表明，MIPOSS单元能有效地提高共聚物的热性能。
The poly(styrene-alt-maleimide isobutyl POSS) (PSMIPOSS) alternating copolymer is one-pot synthesized via reversible addition-fragmentation transfer (RAFT) polymerization. The results show that a POSS-containing alternating copolymer with a high degree of polymerization (DP) and a low polydispersity index (PDI) is successfully constructed by alternating copolymerization of maleimide isobutyl POSS with styrene, and the molecular weight of the PSMIPOSS alternating copolymer can be well controlled by the amount of RAFT agent. Poly(styrene-alt-maleimide isobutyl POSS)-block-polystyrene (PSMIPOSS-b-PS) block copolymers are also one-pot prepared by RAFT polymerization, and their self-assembly behavior in the bulk is investigated by transmission electron microscopy (TEM) and small angle X-ray scattering (SAXS), which exhibit a series of short-range order phase transitions from the POSS sphere, POSS cylinder to lamella structures with the weight fraction of MIPOSS ranging from 13% to 64%. The thermal properties of POSS-containing copolymers are evaluated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), respectively. The results display that MIPOSS units can enhance the thermal properties of copolymers effectively.