期刊
JOURNAL OF POLYMERS AND THE ENVIRONMENT
卷 18, 期 4, 页码 647-653出版社
SPRINGER
DOI: 10.1007/s10924-010-0223-y
关键词
Recycled poly(ethylene terephthalate); Styrene-ethylene/butylenes-styrene; Compatibilization; Crystallization; Toughening
资金
- National Natural Science Foundation of China [20574019]
Recycled poly(ethylene terephthalate) (R-PET) was blended with 15-30 wt% of styrene-ethylene/butylenes-styrene (SEBS) block copolymer and maleic anhydride grafted SEBS (SEBS-g-MA). Effects of nucleation and toughening of the elastomers were evaluated systematically by study of morphology, crystallization, thermal and mechanical properties of the blend. The addition of 30 wt% SEBS promoted the formation of co-continuous structure of the blend and caused the fracture mechanism to change from strain softening to strain hardening. Addition of SEBS-g-MA resulted in significant modification of phase morphology and obviously improved the impact strength. The compatibilization reaction of PET with SEBS-g-MA accelerated the crystallization of PET and increased the crystallinity. The shifts in glass transition temperature of PET towards that of SEBS-g-MA and the higher modulus for R-PET/SEBS-g-MA (70/30) blend found by DMA are also indications of better interactions under the conditions of compatibilization and interpenetrating structure.
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