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Core-shell particle toughened PBT/PET alloy

A particle and core-shell technology, applied in the field of core-shell particle toughened PBT/PET alloy, can solve the problems of low thermal deformation temperature, strong notch sensitivity, large shrinkage rate, etc., and achieve the goal of improving notched impact strength and good application prospects Effect

Inactive Publication Date: 2015-06-03
QINGDAO JIAYIYANG IND & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when PBT / PET alloy is used as an engineering plastic, the biggest disadvantages are strong notch sensitivity, low notch impact strength, low heat distortion temperature, and large shrinkage rate. These shortcomings greatly limit its application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A core-shell particle toughened PBT / PET alloy, the components of which are: PBT 38%, PET 38%, micron calcium carbonate 10%, ethylene-octene copolymer (POE) 8%, methyl 1.5% acrylic acid, 0.3% azobisisobutyronitrile, 1.2% compound of sodium benzoate and ethylene-sodium methacrylate ionomer, 0.5% triphenyl phosphite, hindered phenol antioxidant 1076 and phosphite Antioxidant 168 compound 1%, AClyn low molecular weight ionomer dispersant 1.5%. Wherein, the PBT is polybutylene terephthalate; the PET is polyethylene terephthalate, and its characteristic viscosity is 0.7-1.1 dL / g.

[0024] Preparation method: (1) Dry PBT at 130°C-140°C for 3-5 hours, PET at 130°C-150°C for 3-4 hours, micron calcium carbonate at 60°C-80°C for 1-2 hours (2) Weigh the dried micron calcium carbonate according to the weight ratio and add it to the high-speed mixer with a barrel temperature of 30°C to 80°C, stir for 3 to 15 minutes, and then add the formazan weighed according to the weight ratio A...

Embodiment 2

[0026] A core-shell particle toughened PBT / PET alloy, the composition of which is: 45% PBT, 24% PET, 15% nano-calcium carbonate, 10% nitrile rubber (NBR), 2% methacrylic acid , 0.5% diethyl azodicarboxylate, 1% compound of sodium benzoate and ethylene-sodium methacrylate ionomer, 0.3% triphenyl phosphite, hindered phenol antioxidant 1076 and phosphite antioxidant Oxygen 168 compound 1%, TAS-2A dispersant 1.2%. Wherein, the PBT is polybutylene terephthalate; the PET is polyethylene terephthalate, and its characteristic viscosity is 0.7-1.1 dL / g.

[0027] Preparation method: (1) Dry PBT at 130°C-140°C for 3-5 hours, PET at 130°C-150°C for 3-4 hours, and nano-calcium carbonate at 60°C-80°C for 1-2 hours , stand-by; (2) Weigh the dried nano-calcium carbonate according to the weight ratio and add it to the high-speed mixer with a barrel temperature of 30°C to 80°C, stir for 3 to 15 minutes, and then add the formazan acrylic acid and diethyl azodicarboxylate, stirred for 10 to 30 ...

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Abstract

The invention discloses a core-shell particle toughened PBT / PET alloy which comprises the following components in percentage by mass: 20-50 percent of PBT, 20-50 percent of PET, 5-15 percent of calcium carbonate particles, 5-10 percent of an elastomer, 0.5-2 percent of methacrylic acid, 0.1-1 percent of an initiator, 0.1-2 percent of a compound nucleating agent, 0.1-1 percent of a chain extender, 0.1-1 percent of an antioxidant and 0.5-2 percent of a dispersing agent. The PBT / PET alloy disclosed by the invention has the beneficial effects that compared with the prior art, the calcium carbonate particles subjected to surface modification interact with the elastomer so as to carry out a grafting reaction, the core-shell particles which take the calcium carbonate particles as the core and the elastomer as the shell are formed for performing toughening modification on the PBT / PET alloy, the notch impact strength, rigidity, heat resistance and corrosion resistance of the alloy can be greatly improved, and the PBT / PET alloy has excellent mechanical, chemical and electrical properties and has excellent application prospects.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a core-shell particle toughened PBT / PET alloy. Background technique [0002] Polybutylene terephthalate (PBT) is a new type of engineering plastic developed rapidly in the 1970s. Its general mechanical properties are superior to polyethylene terephthalate (PET), and it has good It has excellent toughness and can be molded, but its fluidity and heat resistance are not as good as PET, and its price is higher. Since the chemical structures of PBT and PET are similar, blending the two can learn from each other and obtain a PBT / PET alloy with ideal comprehensive properties. However, when PBT / PET alloy is used as an engineering plastic, the biggest disadvantages are strong notch sensitivity, low notch impact strength, low heat distortion temperature, and large shrinkage rate. These shortcomings greatly limit its application. Therefore, it is necessary to carry out toughenin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08K9/04C08K3/26B29C47/92B29C48/92
Inventor 不公告发明人
Owner QINGDAO JIAYIYANG IND & TRADE
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