Core-shell particle toughened PBT/PC alloy and preparation method

A particle, core-shell technology, applied in the field of PBT/PC alloy and its preparation, can solve the problems of high melt viscosity, poor solvent resistance, low low temperature impact strength, etc. capacitive effect

Inactive Publication Date: 2017-05-10
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is poor solvent resistance and high melt viscosity
[0003] PBT / PC alloy has excellent heat resistance, chemical resistance, mechanical properties, etc., but because PBT / PC alloy is sensitive to notch and low temperature impact strength, it needs to be modified by adding toughening agent
Traditional rubber elastomers toughen PBT / PC alloys, while improving the notched impact strength, the rigidity, strength, and processing fluidity of the material will be reduced

Method used

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  • Core-shell particle toughened PBT/PC alloy and preparation method
  • Core-shell particle toughened PBT/PC alloy and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 A method for preparing a core-shell particle toughened PBT / PC alloy, (1) Take 753 g of polybutadiene latex with a solid content of 59.7% and add it to the reactor, add 2.25 g of sodium pyrophosphate, and 3.15 g of glucose , 0.045g ferrous sulfate, 1500mL deionized water, cumene peroxide (CHP), their mass ratio is 753:2.25:3.15:0.045:1500:0.28, nitrogen protection, the reaction temperature is 70 oC . Add dropwise the mixture of methyl methacrylate, styrene, cumene hydroperoxide and TDDM in the weight ratio of 110:331:1.125:1.72 to the reactor, after the addition is completed, add the mixture in the weight ratio of 9:0.28 Glycidyl methacrylate and cumene hydroperoxide, reacted for 1 hour, coagulated, washed, at 60 oC Under the condition of drying for 24 hours, the core-shell particle (PB-g-MSG) copolymer was obtained. The TDDM content of the core-shell particles prepared in Example 1 is 0.38%, and the properties are listed in Table 1.

[0018] (2) Put polycar...

Embodiment 2

[0021] Example 2 Methyl methacrylate, styrene, cumene hydroperoxide and TDDM were added dropwise into the reactor at a weight ratio of 110:331:1.125:3.44, and the rest were the same as in Example 1.

[0022] The TDDM content of the core-shell particles prepared in Example 2 is 0.76%, and the properties are listed in Table 1.

[0023] Step (2) and step (3) are the same as in Example 1.

[0024] The prepared blend material was heated at 240 oC Injection into standard specimens for mechanical testing under conditions, and measure impact and tensile properties according to ASTM-D256 and ASTM-638 standards. The properties of the modified materials are shown in Table 2.

Embodiment 3

[0025] Example 3 Methyl methacrylate, styrene, cumene hydroperoxide and TDDM were added dropwise into the reactor at a weight ratio of 110:33:1.125:5.16, and the rest were the same as in Example 1.

[0026] The TDDM content of the core-shell particles prepared in Example 3 is 1.14%, and the properties are listed in Table 1.

[0027] Step (2) and step (3) are the same as in Example 1.

[0028] The prepared blend material was heated at 240 o Under the condition of C, it is injected into a mechanical test standard sample, and the impact and tensile properties are measured according to the ASTM-D256 and ASTM-638 standards. The properties of the modified materials are shown in Table 2.

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Abstract

The invention discloses core-shell particle toughened PBT / PC alloy which is composed of 50% of PBT, 30% of PC and 20% of PBg-MSG core-shell particles. The PB-g-MSG core-shell particles are adopted as a modifier, core-shell particles PB-g-MSG taking polybutadiene as a core and methyl methacrylate-styrene-glycidyl methacrylate copolymer as a shell are used to toughen PBT / PC, and vitrification temperature and grafting degree of polybutadiene in the core-shell particles are regulated by changing molecular weight to adjust using amount of TDDM, so that effective toughening of PBT / PC is realized by PB-g-MSG. As content of TDDM is increased, glass-transition temperature of polybutadiene is lowered, and toughening ability of the core-shell particles is improved. At the same time, content of rigid and free methyl methacrylate-styrene-glycidyl methacrylate copolymer (f-MSG) in the system is increased, and PBT and the f-MSG copolymer react, so that strength of a mixture is improved. Notch impact strength of the mixture reaches 904J / m, tensile strength is 49.4MPa, and high strength and high tenacity are realized.

Description

technical field [0001] The invention relates to the field of polymer materials, specifically a PBT / PC alloy composed of polycarbonate (PC), polybutylene terephthalate (PBT), PB-g-MSG core-shell particles and its Preparation. Background technique [0002] Polybutylene terephthalate (PBT) and polycarbonate (PC) are two widely used engineering plastics. PBT has high heat resistance, fatigue resistance, chemical resistance, and can be crystallized rapidly at low temperature, forming sex is good. The disadvantage is that the notched impact strength is low and the molding shrinkage is large. PC has good optical transparency, high impact strength, and has excellent thermal stability and creep resistance. The disadvantage is poor solvent resistance and high melt viscosity. [0003] PBT / PC alloy has excellent heat resistance, chemical resistance, mechanical properties, etc., but because PBT / PC alloy is sensitive to notch and low-temperature impact strength, it needs to be modifie...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L69/00C08L51/04C08F279/06C08F212/08C08F220/14C08F220/32C08F2/38
CPCC08L67/02C08F2/38C08F279/06C08L2205/03C08L2207/53C08L69/00C08L51/04C08F212/08
Inventor 孙树林邓斌
Owner CHANGCHUN UNIV OF TECH
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