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Preparation and Properties of a New Type of Poly (butylene-terephthalate) with Layered
Silicate Nanocomposites

KE Yangchuan   

  1. State Key Laboratory of Heavy Oil Processing, University of Petroleum, Beijing,102249,
    China
  • Received:1900-01-01 Revised:1900-01-01 Online:2003-12-28 Published:2003-12-28
  • Contact: KE Yangchuan

一种新型聚对苯二甲酸丁二醇酯-层状硅酸盐纳米复合材料的制备与性能

柯扬船   

  1. State Key Laboratory of Heavy Oil Processing, University of Petroleum, Beijing,102249,
    China
  • 通讯作者: 柯扬船

Abstract: In this paper, poly(butylene-terephthalate)-layered silicate of clay nanocomposites (NPBT)
are reported. Their thermal properties, heat distortion temperature (HDT) and
crystallization nucleation are investigated. NPBT samples have apparent viscosity over
0.85, HDT of 30℃ to 50℃ higher than that of poly (butyleneterephthalate) (PBT) for clay
load from 1.0% to 10.0% (by mass), and higher capability to accommodate clay than other
polymers. The nonisothermal crystallization experiments indicate that the better thermal
degradation behavior and crystallization rate of NPBT are 50% higher than PBT, and its
injection mould processing temperature is lowered from 110℃ to 55℃. NPBT samples are
characterized by several techniques. X-ray shows an original clay interlayer distance
enlarged from 1.0 nm to 2.5 nm, while both TEM and AFM indicate an average size from 30nm
to 100nm of exfoliated clay layers, and 3%(by mass) of particle agglomeration being phase
separated from PBT matrix, which are factors on some mechanical properties decrease of
NPBT. The disappearance of spherulitic morphology in NPBT resulted from layers nucleation
is detected. Improving NPBT properties by treating clay with long chain organic reagent and
controlling the way to load it is suggested.

Key words: poly(butylene-terephthalate)-layered silicate of clay nanocomposites, crystallization nucleation, thermal properties, phase separation

摘要: In this paper, poly(butylene-terephthalate)-layered silicate of clay nanocomposites (NPBT)
are reported. Their thermal properties, heat distortion temperature (HDT) and
crystallization nucleation are investigated. NPBT samples have apparent viscosity over
0.85, HDT of 30℃ to 50℃ higher than that of poly (butyleneterephthalate) (PBT) for clay
load from 1.0% to 10.0% (by mass), and higher capability to accommodate clay than other
polymers. The nonisothermal crystallization experiments indicate that the better thermal
degradation behavior and crystallization rate of NPBT are 50% higher than PBT, and its
injection mould processing temperature is lowered from 110℃ to 55℃. NPBT samples are
characterized by several techniques. X-ray shows an original clay interlayer distance
enlarged from 1.0 nm to 2.5 nm, while both TEM and AFM indicate an average size from 30nm
to 100nm of exfoliated clay layers, and 3%(by mass) of particle agglomeration being phase
separated from PBT matrix, which are factors on some mechanical properties decrease of
NPBT. The disappearance of spherulitic morphology in NPBT resulted from layers nucleation
is detected. Improving NPBT properties by treating clay with long chain organic reagent and
controlling the way to load it is suggested.

关键词: poly(butylene-terephthalate)-layered silicate of clay nanocomposites;crystallization nucleation;thermal properties;phase separation