Thermoplastic resin composition and method for producing same

Abstract

The purpose of the present invention is to provide a thermoplastic resin composition having excellent rigidity and impact resistance and a method for producing the same. The thermoplastic resin composition is obtained by mixing a polyolefin resin (such as a polypropylene resin), a polyamide resin (such as nylon 11 resin), and a compatibilizer (such as maleic anhydride-modified EPR, maleic anhydride-modified EBR). The thermoplastic resin composition is characterized in having a resin phase separate structure as observed under an electron microscope, wherein the resin phase separate structure consists of a continuous phase and a disperse phase dispersed in the continuous phase, there is a microdisperse phase in the disperse phase, and the average diameter of the microdisperse phase is 5 to 1,200 nm.

Description

technical field

[0001] The present invention relates to a thermoplastic resin composition and a method for producing the same. More specifically, the present invention relates to a thermoplastic resin composition having excellent rigidity and excellent impact resistance, and a method for producing the same. Background technique

[0002] Polymer blends (including polymer alloys) in which properties of resins are modified by mixing resins with different polarities have been actively studied (see, for example, Patent Documents 1 to 4).

[0003] In particular, in the fields of interior parts and exterior parts of automobiles, high mechanical properties are required, and therefore both impact resistance and rigidity (bending modulus of elasticity) must be balanced.

[0004] However, the current situation is that in the above-mentioned blend polymers, the properties of impact resistance and rigidity are in a trade-off relationship. In particular, there is an inverse relationship ...

Examples

Embodiment

[0144] Hereinafter, the present invention will be described more specifically by way of examples.

[0145] [1] Production of thermoplastic resin composition using PA11 as polyamide resin and preparation of test specimens

[0146]

[0147] (1) Preparation of mixed resin

[0148] PA11 (nylon 11 resin, manufactured by Arkema K.K., trade name "Rilsan BMNO", weight average molecular weight 18,000, melting point 190°C) was used as (A) polyamide resin, and maleic anhydride modified was used as (C) compatibilizer EPR (manufactured by Mitsui Chemicals, Inc., trade name "TAFMER MP0620", MFR (230°C) = 0.3g / 10min), these pellets were dry-blended according to the proportion shown in Table 1, and then put into the twin-screw melt Mixing extruder (TECHNOVEL Corporation. manufacture, screw diameter 15mm, L / D=59), mix under the condition of mixing temperature 210 ℃, extrusion speed 2.0kg / hour, screw speed 200 rev / mins, and then The extruded mixed resin was cut using a pelletizer to produce...

Embodiment 2～11

[0153] (C) Maleic anhydride-modified EBR (manufactured by Mitsui Chemicals, Inc., trade name "TAFMER MH7020", MFR (230° C.) = 1.5 g / 10 minutes) was used as a compatibilizer, and the formulation shown in Table 1 was used. Except having dry-blended each pellet, it carried out similarly to Example 1, and produced the pellet of the thermoplastic resin composition of Examples 2-11. Next, injection molding was performed in the same manner as in Example 1 to obtain test pieces for evaluation in Examples 2 to 11.

[0154]

[0155] (C) Maleic anhydride-modified PP (manufactured by Sanyo Chemical Industries, Ltd., trade name "Umex 1001, weight average molecular weight 40000, acid value 26", MFR (230° C.) = 0.7 g / 10 minutes was used as a compatibilizer ), except that each pellet was dry-blended according to the compounding ratio shown in Table 1, pellets of the thermoplastic resin composition of Comparative Example 1 were produced in the same manner as in Example 1. Next, injection mo...

Embodiment 1

[0162] [2] Evaluation of thermoplastic resin composition (Examples 1 to 11)

[0163] (1) Determination of Charpy impact strength

[0164] Charpy impact strength was measured in accordance with JIS K7111-1 using each of the test pieces for evaluation in Examples 1 to 11 obtained in [1] above. The results are shown in Table 2 and Table 3. In addition, in the measurement of this Charpy impact strength, the impact measurement was performed by the edgewise test method at the temperature of 23 degreeC using the test piece which has a notch (type A).

[0165] (2) Morphological observation

[0166] The fracture surfaces of the test pieces of Examples 1 to 11 and Comparative Examples 1 to 3 used for the Charpy impact strength measurement in the above (1) were subjected to oxygen plasma etching treatment at 100 W for 1 minute, and then coated with osmium. The treatment was observed with an electric field emission scanning electron microscope (FE-SEM) (manufactured by JEOL Ltd.), and ...

technical field

[0001] The present invention relates to a thermoplastic resin composition and a method for producing the same. More specifically, the present invention relates to a thermoplastic resin composition having excellent rigidity and excellent impact resistance, and a method for producing the same. Background technique

[0002] Polymer blends (including polymer alloys) in which properties of resins are modified by mixing resins with different polarities have been actively studied (see, for example, Patent Documents 1 to 4).

[0003] In particular, in the fields of interior parts and exterior parts of automobiles, high mechanical properties are required, and therefore both impact resistance and rigidity (bending modulus of elasticity) must be balanced.

[0004] However, the current situation is that in the above-mentioned blend polymers, the properties of impact resistance and rigidity are in a trade-off relationship. In particular, there is an inverse relationship ...

Examples

Embodiment

[0144] Hereinafter, the present invention will be described more specifically by way of examples.

[0145] [1] Production of thermoplastic resin composition using PA11 as polyamide resin and preparation of test specimens

[0146]

[0147] (1) Preparation of mixed resin

[0148] PA11 (nylon 11 resin, manufactured by Arkema K.K., trade name "Rilsan BMNO", weight average molecular weight 18,000, melting point 190°C) was used as (A) polyamide resin, and maleic anhydride modified was used as (C) compatibilizer EPR (manufactured by Mitsui Chemicals, Inc., trade name "TAFMER MP0620", MFR (230°C) = 0.3g / 10min), these pellets were dry-blended according to the proportion shown in Table 1, and then put into the twin-screw melt Mixing extruder (TECHNOVEL Corporation. manufacture, screw diameter 15mm, L / D=59), mix under the condition of mixing temperature 210 ℃, extrusion speed 2.0kg / hour, screw speed 200 rev / mins, and then The extruded mixed resin was cut using a pelletizer to produce...

Embodiment 2～11

[0153] (C) Maleic anhydride-modified EBR (manufactured by Mitsui Chemicals, Inc., trade name "TAFMER MH7020", MFR (230° C.) = 1.5 g / 10 minutes) was used as a compatibilizer, and the formulation shown in Table 1 was used. Except having dry-blended each pellet, it carried out similarly to Example 1, and produced the pellet of the thermoplastic resin composition of Examples 2-11. Next, injection molding was performed in the same manner as in Example 1 to obtain test pieces for evaluation in Examples 2 to 11.

[0154]

[0155] (C) Maleic anhydride-modified PP (manufactured by Sanyo Chemical Industries, Ltd., trade name "Umex 1001, weight average molecular weight 40000, acid value 26", MFR (230° C.) = 0.7 g / 10 minutes was used as a compatibilizer ), except that each pellet was dry-blended according to the compounding ratio shown in Table 1, pellets of the thermoplastic resin composition of Comparative Example 1 were produced in the same manner as in Example 1. Next, injection mo...

Embodiment 1

[0162] [2] Evaluation of thermoplastic resin composition (Examples 1 to 11)

[0163] (1) Determination of Charpy impact strength

[0164] Charpy impact strength was measured in accordance with JIS K7111-1 using each of the test pieces for evaluation in Examples 1 to 11 obtained in [1] above. The results are shown in Table 2 and Table 3. In addition, in the measurement of this Charpy impact strength, the impact measurement was performed by the edgewise test method at the temperature of 23 degreeC using the test piece which has a notch (type A).

[0165] (2) Morphological observation

[0166] The fracture surfaces of the test pieces of Examples 1 to 11 and Comparative Examples 1 to 3 used for the Charpy impact strength measurement in the above (1) were subjected to oxygen plasma etching treatment at 100 W for 1 minute, and then coated with osmium. The treatment was observed with an electric field emission scanning electron microscope (FE-SEM) (manufactured by JEOL Ltd.), and ...

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