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The effect of POSS-based block copolymer as compatibilizer on POSS/epoxy composites

Published online by Cambridge University Press:  28 January 2015

Yiting Xu ,
Cong Li ,
Min Chen ,
Jianjie Xie ,
Ying Cao ,
Yuanming Deng ,
Conghui Yuan  and
Lizong Dai
Yiting Xu*
Affiliation:
Fujian Provincial Key Laboratory of Fire Retardant Materials, College of Materials, Xiamen University, Xiamen, China
Cong Li
Affiliation:
Fujian Provincial Key Laboratory of Fire Retardant Materials, College of Materials, Xiamen University, Xiamen, China
Min Chen
Affiliation:
Fujian Provincial Key Laboratory of Fire Retardant Materials, College of Materials, Xiamen University, Xiamen, China
Jianjie Xie
Affiliation:
Fujian Provincial Key Laboratory of Fire Retardant Materials, College of Materials, Xiamen University, Xiamen, China
Ying Cao
Affiliation:
Fujian Provincial Key Laboratory of Fire Retardant Materials, College of Materials, Xiamen University, Xiamen, China
Yuanming Deng
Affiliation:
Fujian Provincial Key Laboratory of Fire Retardant Materials, College of Materials, Xiamen University, Xiamen, China
Conghui Yuan
Affiliation:
Fujian Provincial Key Laboratory of Fire Retardant Materials, College of Materials, Xiamen University, Xiamen, China
Lizong Dai*
Affiliation:
Fujian Provincial Key Laboratory of Fire Retardant Materials, College of Materials, Xiamen University, Xiamen, China
*
a)Address all correspondence to these authors. e-mail: xyting@xmu.edu.cn
b)e-mail: lzdai@xmu.edu.cn
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Abstract

In this study, a novel hybrid block copolymer containing POSS (BCP), poly(methacrylisobutyl-POSS)-b-poly(methylmethacrylate) (PMAiBuPOSS-b-PMMA) was synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization. The structure and molecular weight were characterized via 1H NMR and GPC. BCP was creatively used as the compatibilizer to overcome the bad compatibility of epoxy and POSS in their blend system. SEM and dynamic mechanical thermal analyses (DMTA) were used to observe the surface morphology and thermal–mechanical behaviors of the resultant products. We found that the amount of microaggregation domains of POSS decreased, while the nano ones increased, when BCP content increased. All the aggregation domains were distributed in epoxy matrix uniformly at nanoscale with the addition of 10 phr BCP and 5 phr POSS monomers. The results indicated that BCP could effectively improve the compatibility between epoxy resin and POSS owing to its amphiphilicity in DGEBA. The fracture behavior of products transformed from brittle fracture to ductile fracture gradually with the increase of BCP, whereas the Tg and E′ decreased.

Keywords

hybrid block copolymerPOSSnanocompositescompatibilizerphase separation
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 2 , 28 January 2015 , pp. 266 - 277
Copyright
Copyright © Materials Research Society 2015 

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Footnotes

Contributing Editor: Linda S. Schadler

References

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