期刊
POLYMER
卷 49, 期 16, 页码 3462-3469出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2008.06.003
关键词
quiescent annealing; co-continuous morphology; graft copolymer
资金
- National Natural Science Foundation of China [50390097, 20310285]
- Ministry of Science and Technology of China [2001CB711203]
- Association Franco-Chinoise pour la Recherche Scientifique et Technique - AFCRST [PRA Mx02-07]
This work was aimed at studying the efficiency of graft copolymers at stabilizing the co-continuous morphology of polystyrene (PS)/polyamide 6 (PA6) blends during quiescent annealing. A series of graft copolymers with PS as backbone and PA6 as grafts, denoted as PS-g-PA6, with different molecular structures and compositions were used as compatibilizers. The co-continuous domain size of the blends without PS-g-PA6 increased almost linearly with annealing time. The addition of the PS-g-PA6 not only narrowed down the composition range of co-continuity of PS/PA6 blend but also slowed down and even stopped completely the coarsening of the co-continuous morphology during the quiescent annealing. Moreover, the efficiency of PS-g-PA6 depended very much on its molecular structure and/or composition. For graft copolymers with similar backbone and graft chain number, the longer the grafts, the higher their stabilizing efficiency. For a given backbone/graft composition, graft copolymers having fewer and longer grafts were more efficient at compatibilizing and stabilizing the co-continuous morphology. (c) 2008 Elsevier Ltd. All rights reserved.
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