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【Ind Eng Chem Res】Effect of dual reactive compatibilizers on the formation of co-continuous morphology of low density polyethylene/polyamide 6 blends with low polyamide 6 content
作者:Ren Dawei, Tu Zhaokang, Yu Changjiang, Shi Hengchong*, Jiang Tao, Yang Yingkui, Shi Dean*, et al
關(guān)鍵字:co-continuous morphology, dual reactive compatibilizers, flat interface
論文來(lái)源:期刊
發(fā)表時(shí)間:2016年
The coexistence of two kinds of reactive compatibilizers at the interface in immiscible LDPE/PA6 blends, namely, polyethylene graft maleic anhydride (PE-g-MAH) with a long backbone length and polybutadiene graft maleic anhydride (PB-g-MAH) with a short backbone length, promoted the formation of a flat interface and induced a co- continuous morphology in blends containing 30 wt.% PA6. The relationships between the contents and content ratios of the dual reactive compatibilizers as well as the morphologies of the resulting LDPE/PA6 blends are examined quantitatively. The morphologies of the blends are characterized by SEM and TEM combined with a selective solvent extraction process. It is found that in these systems, when the total content of the dual compatibilizers is within 20~30 wt.% and the content ratio of PE-g-MAH and PB-g-MAH is within 2:1~3:1, the minor PA6 phase can also form a co-continuous morphology in the LDPE matrix. The balance between the stability (determined by in situ formed PE-g-PA6 grafted copolymer with long backbone length) and flexibility of the flat interface (determined by in situ formed PB-g-PA6 grafted copolymer with short backbone length) in the compatibilized LDPE/PA6 blends is the key factor that controls the formation of the co-continuous morphology with low PA6 contents.
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