Method for improving crystallization property of PTT or PTT/PBT blend

A mixture and premixing technology, which is applied in the field of polymer processing, can solve the problems of inapplicability, achieve the effect of increasing the crystallization rate and crystallization temperature, fine and uniform crystal morphology, and improving processing performance and molding efficiency

Inactive Publication Date: 2011-04-06
CHINA NAT BLUESTAR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] CN200810119349.1 adds composite nucleating agent in the extruding granulation process of composite material with PBT as base resin, improves the crystallization rate and crystallization temperature of PBT, but its used dispersant glycyl methacrylate (GMA) Grafted polyethylene elastomers and polyethylene are not suitable for PTT or PTT / PBT blends

Method used

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  • Method for improving crystallization property of PTT or PTT/PBT blend
  • Method for improving crystallization property of PTT or PTT/PBT blend

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Premixing: Add 1500g of PTT with an intrinsic viscosity of 0.9dl / g and 15g of attapulgite with an average particle diameter of 0.5 to 1.0μm in the length direction and 0.1 to 0.15μm in the width direction into the high-speed mixer in sequence. Mix for 5 minutes at a temperature of 30°C and a rotation speed of 200 rpm to form a mixture;

[0045] (2) Extrusion granulation: Add the material mixed in step (1) into the co-rotating parallel twin-screw extruder, control the extrusion temperature of each section to 220-250°C, the screw speed is 450rpm, and the feeder speed is 50rpm, obtains the PTT complex product, and its product performance is shown in T1 item in Table 1.

Embodiment 2

[0047] (1) Premixing: 2000g of PTT with an intrinsic viscosity of 1.05dl / g and 60g of attapulgite with an average particle diameter of 0.5 to 1.0μm in the length direction and 0.1 to 0.15μm in the width direction are added to the high-speed mixer in sequence. Mix for 3 minutes at a temperature of 25°C and a rotation speed of 100 rpm to form a mixture;

[0048] (2) Extrusion granulation: Add the material mixed in step (1) into the co-rotating parallel twin-screw extruder, control the extrusion temperature of each section to 220-250°C, the screw speed is 300rpm, and the feeder speed is 30rpm, obtain the PTT compound product, its product performance sees TT1 item in Table 1.

Embodiment 3

[0050] (1) Premixing: Add 1500g of PTT with an intrinsic viscosity of 1.3dl / g, 15g of attapulgite with an average particle size of 0.5-1.0μm in the length direction and 0.1-0.15μm in the width direction, and 7.5g of Surlyn8920 in sequence A high-speed mixer, mixing at a temperature of 25°C and a rotation speed of 200rpm for 4 minutes to form a mixture;

[0051] (2) Extrusion granulation: Add the material mixed in step (1) into the co-rotating parallel twin-screw extruder, control the extrusion temperature of each section to 220-250°C, the screw speed is 400rpm, and the feeder speed is 40rpm, obtain the PTT compound product, and its product performance is shown in T3 item in Table 1.

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Abstract

The invention relates to a method for improving the crystallization property of a polytrimethylene terephthalate (PTT) or PTT/(polybutylece terephthalate) PBT blend, which comprises the step of adding a compound nucleating agent in the PTT or PTT/PBT blend. The method can remarkably improve the crystallization rate and the crystallization temperature of the PTT or PTT/PBT blend, and is beneficial to the improvement of the processing forming performance and the forming efficiency of a composite material of basic resin using the PTT or PTT/PBT blend as a main body.

Description

technical field [0001] The invention belongs to the field of polymer processing, in particular, relates to a method of improving polytrimethylene terephthalate (PTT) or polytrimethylene terephthalate (PTT) / polybutylene terephthalate (PBT) A method for the crystallization properties of blends. Background technique [0002] PTT is the first aromatic polyester produced industrially by Shell Chemical Company. It has been gradually used in the fields of fibers, films and reinforced engineering plastics, showing excellent weather resistance, heat resistance and strength. [0003] Youkochi et al. found that there may be two crystal forms in PBT crystals, namely α crystal form and β crystal form, and their unit cell parameters are The α crystal form and β crystal form of PBT will change under certain conditions. Similar to PBT, PTT also belongs to the triclinic system, and the unit cell parameters are: It can be seen that the lattice size of PTT is generally larger than the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K3/34C08K13/02B29B9/06B29C47/92B29C48/92
CPCB29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 杨军忠姜立忠邝清林江枫丹隋轶巍李瑞亢胡衍平
Owner CHINA NAT BLUESTAR GRP CO LTD
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