Rheological Properties of PET/PA66/Liquid Crystalline Copolyesteramide Blends

Chem. J. Chinese Universities ›› 1997, Vol. 18 ›› Issue (9): 1551.

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Rheological Properties of PET/PA66/Liquid Crystalline Copolyesteramide Blends

XIE Xiao-Lin¹, SHEN TU Bao-Qing¹, LI Bo-Geng¹, PAN Zu-Ren¹, WU Da-Cheng²

1. State Key Lab. of Polym. Reaction Eng., Institute of Polym.Set. and Eng., Zhejiang Univer.vity, Hangzhou 310027;
2. Light Industrial and Textile Institute, Sichuan Ltnion University. Chengdu, 610065

Received:1996-07-22 Online:1997-09-24 Published:1997-09-24

Abstract

Abstract: The blends of poly(ethylene terephthalate) (PET), polyamlde 66 (PA66) andliquid crystalline copolyesteramide (LC30) were prepared by mechanical mixing. Theirmorphology and rheological properties were investigated by means of SEM, cross polarizingoptical microscope with hot-stage and Instron3211 type capillary rheometer. The results showthat PET/PA66/LC30 is an incompatible multiphase blending system in thermo dynamics.The compatibility and rheological properties of PET/PA66 blends are greatly improved byadding LC30. The viscosity curves of PET/PA66/LC30 melts consist of two regions: a shearthinning region at low shear rate and a"pseudo Newtonian" region. PET/PA66/LC30 blendsshow the character of the positive deviation blends (PDB), whereas PET/PA66 blends showthe character of the negative deviation blends (NDB). The rheological properties of theseblends are affected by their morphologlcal structure.

Key words: Liquid crystalline copolyesteramide, Poly (ethylene terephthalate), Polyamide66, Blends, Rheologlcal property

CLC Number:

O631.2

TrendMD:

XIE Xiao-Lin, SHEN TU Bao-Qing, LI Bo-Geng, PAN Zu-Ren, WU Da-Cheng. Rheological Properties of PET/PA66/Liquid Crystalline Copolyesteramide Blends[J]. Chem. J. Chinese Universities, 1997, 18(9): 1551.

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Rheological Properties of PET/PA66/Liquid Crystalline Copolyesteramide Blends

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