Transcrystallization of Polypropylene in the Presence of Polyester/Cellulose Nanocrystal Composite Fibers
writer：Jing Huang, Chunjiang Xu, Defeng Wu, Qiaolian Lv
keywords：polypropylene; transcrystallization; cellulose nanocrystal; poly(trimethylene terephthalate); composite fibers.
source：期刊
specific source：Carbohydrate Polymers
Issue time：2017年
Carbohydrate Polymers, 2007, 167, 105-114.
ABSTRACT:
Pristine
cellulose nanocrystal (CNC) and acetylated one (aCNC) were used as the modifier to change the surface properties of
poly(trimethylene terephthalate) (PTT)
fibers for the transcrystallization study of polypropylene (PP). The results
reveal that all three kinds of fibers, including the neat PTT, PTT/CNC and PTT/aCNC ones can induce PP
transcrystallization. But the PTT/aCNC
fiber-filled PP system shows the most remarkable transcrystallization behavior
because of the highest nucleation density of PTT/aCNC fiber. The long period and lamellar thickness of two
composite fiber-filled PP systems increase as compared with the neat PTT
fiber-filled one, which is caused by the reduced system undercooling and
higher surface energy level of composite fibers. Accordingly, the former two systems show the lower transcrystal growth
rates than the latter, which is further analyzed by the secondary nucleation
theory. This work can provide
useful information on the control of PP transcrystallization using the CNC-filled polyester
composite fibers.
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