Synthesis and properties of pet-clay nano-composite
Zhang, GY; Yi, GZ; Wu, LH; Xu, X; Song, Q; Yang, Y; Jin, J; Zhong, SF; Qi, ZN
AbstractPET-clay hybrid is a nano composite of PET and uniformly dispersed silicate layers of montmorillonite. Cation exchange capacity of the montmorillonite used in our laboratory is 90 meq. /100g. The montmorillonite is a sheet-like particles which are composed of monolayer of 10nm long, 10nm wide and 1nm thick. Montmorillonite was dispersed in water dr EG, then a kind of nitrogen-onium ion was added to exchange cations between layers of the montmorillonite. Because interlayers were intercalated by onium ion, the interlayer spaces were increased, subsequently the layers of the montmorillonite were delaminated and uniformly dispersed in the solvent. The above treated montmorillonite was mixed with PET oligomer. The mixtures were reacted for 3 similar to 4 h at 260 to 280 degrees C, then the PET-clay hybrids were yielded. It is revealed by electron microscopy that the montmorillonite layers are uniformly dispersed at 30 similar to 50 nm layer thick in the PET matrix. Crystallization rate of PET-clay is about 4 similar to 5 times as quick as that: of PET. X-ray patterns of PET-clay hybrids which was quenched at 160 degrees C/min were obtained by WAXD. Crystallinities were calculated by peak resolution method. It is about 53% for quenched PET-clay and much higher than that of pure PET. Neither quenching nor isothermal samples show perfect spherulite structure. It is too small for the size of the spherulite to observe as typical pattern of PET spherulite using polar microscopy and SALS. The montmorillonite layers could act as nucleating agents during crystallization thus increasing crystallization rate, so that molding temperature could be decreased to 60 similar to 80 degrees C during the injection molding. Mechanical and thermal properties of the hybrids were superior to those of PET. The PET-clay hybrids have excellent spinnability. The tensile modulus of the fibers spun by the hybrids is 160 % as high as the one of PET fibers.
KeywordPet Montmorillnite Nano-composite
Indexed BySCI
WOS IDWOS:000080941200009
Citation statistics
Document Type期刊论文
Corresponding AuthorZhang, GY
Affiliation1.China Text Acad, Beijing 100025, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
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GB/T 7714
Zhang, GY,Yi, GZ,Wu, LH,et al. Synthesis and properties of pet-clay nano-composite[J]. ACTA POLYMERICA SINICA,1999(3):309-314.
APA Zhang, GY.,Yi, GZ.,Wu, LH.,Xu, X.,Song, Q.,...&Qi, ZN.(1999).Synthesis and properties of pet-clay nano-composite.ACTA POLYMERICA SINICA(3),309-314.
MLA Zhang, GY,et al."Synthesis and properties of pet-clay nano-composite".ACTA POLYMERICA SINICA .3(1999):309-314.
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