Method for manufacturing a resin molded body, resin molded body, and optical component

Abstract

One aspect of this disclosure relates to a novel method for manufacturing a resin molded article that can be used as an optical component. [Solution] A method for producing a resin molded article, comprising forming a shape having a light-receiving surface in a resin molding material containing a photopolymerizable monomer component, and irradiating the light-receiving surface with active light to form a resin molded article containing a polymer formed by a reaction including polymerization of the monomer component. The intensity of the active light has a periodically changing distribution on the light-receiving surface.

Description

[Technical Field]

[0001] This disclosure relates to a method for manufacturing a resin molded article, a resin molded article, and an optical component. [Background technology]

[0002] Photonic materials utilizing microphase separation structures formed by block copolymers have been proposed (for example, Patent Documents 1 and 2). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2014-221868 [Patent Document 2] International Publication No. 2014 / 185426 [Overview of the project] [Problems that the invention aims to solve]

[0004] One aspect of this disclosure relates to a novel method for manufacturing a resin molded article that can be used as an optical component. [Means for solving the problem]

[0005] This disclosure includes the following: [1] To form a shape having a light-receiving surface in a resin molding material containing a photopolymerizable monomer component, The light-receiving surface is irradiated with active light, thereby forming a resin molded article containing a polymer formed by a reaction including polymerization of the monomer components. Includes, The intensity of the activated light has a distribution that changes periodically on the light-receiving surface. A method for manufacturing a resin molded product. [2] The method according to [1], wherein the intensity of the actinic ray has a distribution that periodically changes due to interference of light from a plurality of light sources on the light-receiving surface. [3] The method according to [2], wherein a plurality of the light sources are two-dimensionally arranged in a lattice pattern. [4] The method according to [2] or [3], wherein the minimum value of the interval between adjacent light sources is 2 mm or more and 5 mm or less. [5] The resin molding material further contains a non-photopolymerizable component, wherein the solubility parameter of the non-photopolymerizable component is inside the compatibility sphere based on the solubility parameter of the monomer component and outside the compatibility sphere based on the solubility parameter of the compatibility evaluation polymer formed by polymerization of the monomer component. The method according to any one of [1] to [4]. [6] The method according to [5], wherein the non-photopolymerizable component contains a photoinitiator. [7] The method according to any one of [1] to [6], wherein the resin molded body forms a periodic structure that generates a diffraction pattern of laser light. [8] containing a polymer, forming a periodic structure that generates a diffraction pattern of laser light, wherein the polymer contains a homopolymer, a random copolymer, or both. Resin molded body. [9] The resin molded body further contains a non-photopolymerizable component, The resin molded body according to [8], wherein the periodic structure includes a portion where the concentration of the non-photopolymerizable component periodically changes.

[10] The resin molded body according to [8] or [9], wherein the periodic structure includes a portion where structural units having a width of 100 nm or more are repeated.

[11] An optical component including the resin molded body according to any one of [8] to

[10] . [Advantages of the Invention]

[0006] A resin molded body that can be used as an optical component such as a photonic material can be manufactured. A novel resin molded body containing a homopolymer or a random copolymer is also provided.

Brief Description of the Drawings

[0007] [Figure 1] FIG. 1 is a cross-sectional view schematically showing an example of a method for manufacturing a resin molded body. [Figure 2] FIG. 2 is a plan view showing an example of a light irradiation device. [Figure 3] FIG. 3 is a schematic view showing an example of a periodic structure of a resin molded body. [Figure 4] FIG. 4 is a schematic view showing an example of a method for generating a diffraction pattern of laser light in a resin molded body. [Figure 5] FIG. 5 is an example of a diffraction pattern of laser light transmitted through a resin molded body. [Figure 6] FIG. 6 is an example of an inverse space image generated by Fourier transform from an electron microscope image of a resin molded body. [Figure 7] FIG. 7 is an example of a two-dimensional light and dark mapping image of the surface of a resin molded body.

Embodiments for Carrying Out the Invention

[0008] The present invention is not limited to the following examples.

[0009] Figure 1 is a schematic cross-sectional view showing an example of a method for manufacturing a resin molded article. The method shown in Figure 1 includes forming a shape having a light-receiving surface S1 on a resin molding material 1A containing a photopolymerizable monomer component, and irradiating the entire light-receiving surface S1 with an active light ray hν using a light irradiation device 60 to form a resin molded article 1 containing a polymer. The resin molded article 1 formed by irradiation with the active light ray hν contains a polymer formed by a reaction including polymerization of the monomer component. The intensity of the active light ray hν has a periodically changing distribution on the light-receiving surface S1. The periodically changing distribution here can be a distribution in which a constant pattern of changing intensity of the active light ray hν is repeated two-dimensionally within the light-receiving surface S1.

[0010] The resin molding material 1A has a light-receiving surface S1 and can form a shape corresponding to the resin molded body 1 to be manufactured within the mold 50. In the example of Figure 1, the mold 50 consists of two transparent plates 51 and 52 arranged parallel to each other and a spacer 55 placed between the transparent plates 51 and 52. Within the mold 50, the resin molding material 1A forms a sheet-like shape having a light-receiving surface S1 and the surface on its back. The light-receiving surface S1 can be a substantially flat surface that does not contain coarse irregularities. However, the light-receiving surface S1 may have minute irregularities. The thickness t of the resin molding material 1A (thickness in the direction perpendicular to the light-receiving surface S1) may be, for example, 10 μm or more and 10 mm or less. The shape formed by the resin molding material 1A is not limited to a sheet shape and can be any shape having a light-receiving surface.

[0011] Figure 2 is a plan view showing the light irradiation device 60 shown in Figure 1. The light irradiation device 60 shown in Figures 1 and 2 has a substrate 61 and a plurality of light sources 62 arranged regularly on the substrate 61. The light sources 62 may be, for example, light-emitting diodes (LEDs).

[0012] In the case of the example of FIG. 2, the substrate 61 has a rectangular main surface having sides along the X direction and sides along the Y direction perpendicular to the X direction, and a plurality of light sources 62 are two-dimensionally arranged in a lattice pattern on the main surface. The arrangement pattern of the plurality of light sources 62 has columns along the X direction and columns along the Y direction. The interval between adjacent light sources 62 in the X direction is d x and the interval between adjacent light sources 62 in the Y direction is d y and the interval between adjacent light sources 62 in the direction of 45° with respect to the X direction is d xy Here, the interval between light sources means the shortest distance between the centers of the light sources, particularly the centers of the light-emitting portions. For example, when the light source is an LED having a light-emitting surface, the shortest distance between the centers of the light-emitting surfaces of adjacent light sources is regarded as the interval between adjacent light sources. In an example of the method according to the present disclosure, the intervals (d x , d y and d xy ) between adjacent light sources 62 may be arranged such that they are constant or change periodically.

[0013] Due to the interference of light from a plurality of regularly arranged light sources 62, the intensity of the active light hν can easily have a periodically changing distribution on the light-receiving surface S1. The distribution of the intensity of the active light hν on the light-receiving surface S1 can include a plurality of positions (bright points) where the intensity shows a maximum. The interval Δx between the positions (bright points) where the intensity of the active light hν shows a maximum on the light-receiving surface S1 is determined by the wavelength λ of the active light hν, the shortest distance L1 between the light source 62 and the light-receiving surface S1, and the intervals d x , d y , d xy and can be estimated by the following formula. Δx = L1λ / d (d = d x , d y or d xy )

[0014] The arrangement pattern of the light sources is not limited to a form composed of two mutually perpendicular columns as in the example of FIG. 2. Regardless of the arrangement pattern, the minimum value of the interval between adjacent light sources may be, for example, 2 mm or more and 5 mm or less. In the case of the arrangement as shown in FIG. 2, d x , dy and d xy The minimum value among them may be within the above numerical range. The spacing between adjacent light sources, L1 and λ may be determined so that the spacing Δx between bright spots is 0.1 μm or more and 100 μm or less. The shortest distance L1 between the light source 62 and the light-receiving surface S1 may be 0.1 cm or more and 50 cm or less.

[0015] The wavelength λ of the active light hν may be between 200 nm and 1500 nm. The active light hν may be monochromatic or may contain light of multiple wavelengths. If the active light hν contains light of multiple wavelengths, the wavelength range of the light that shows the maximum intensity may be within the above range. The total exposure amount of the active light hν on the light-receiving surface S1 is, for example, 9 kJ / m². 2 More than 1800kJ / m 2 The following is also acceptable.

[0016] When activated by active light hν with a periodically changing intensity distribution, a reaction involving the polymerization of monomer components proceeds in the resin molding material 1A, producing a polymer containing monomer units derived from the monomer components. At this time, the molecular weight of the produced polymer tends to be smaller in regions where the intensity of the active light hν is high, and larger in regions where the intensity of the active light hν is low. It is thought that the molecular weight of the produced polymer fluctuates periodically, reflecting the periodically changing intensity distribution of the active light hν, thereby forming a periodic and fine structure in the resin molded body 1.

[0017] The monomer component in resin molding material 1A includes one or more monomers having photopolymerizable groups. The photopolymerizable groups may be photoradical polymerizable groups (particularly photoradical polymerizable unsaturated groups). Examples of photoradical polymerizable groups include acryloyl groups and methacryloyl groups. When the monomer component contains one monomer, a homopolymer composed of one monomer unit is usually formed. When the monomer component contains two or more monomers, a random copolymer composed of two or more monomer units may be formed.

[0018] The monomer component may include a monofunctional monomer having one photopolymerizable group. The monofunctional monomer may be one or more selected from, for example, compounds having an acrylamide group, compounds having a methacrylamide group, acrylic acid esters, and methacrylic acid esters. The monofunctional monomer may be one or more selected from N-(methoxymethyl)acrylamide, N-(3-dimethylamino)propylacrylamide, N-(3-dimethylamide)propylmethacrylamide, 2-[2-(2-methoxyethoxy)-ethoxy]ethyl acrylate, and tetrahydrofluryl acrylate.

[0019] The monomer component may include a polyfunctional monomer having multiple photopolymerizable groups. The monomer component may also include monofunctional monomers and polyfunctional monomers. A polyfunctional monomer used together with a monofunctional monomer can function as a crosslinking agent to crosslink a linear polymer formed by the polymerization of the monofunctional monomer. The polyfunctional monomer may be one or more selected from, for example, compounds having an acrylamide group, compounds having a methacrylamide group, acrylic acid esters, and methacrylic acid esters. Examples of polyfunctional monomers include N,N'-methylenebisacrylamide, ethylene glycol dimethacrylate, and divinylbenzene. The amount of the polyfunctional monomer may be 0.01 mol% or more and 10 mol% or less relative to the amount of the monofunctional monomer.

[0020] The resin molding material 1A may further contain a non-photopolymerizable component, which is a compound that does not have a photopolymerizable group. When the resin molding material 1A contains a non-photopolymerizable component, the concentration of the non-photopolymerizable component may have a periodically changing distribution based on the difference between the solubility of the non-photopolymerizable component in monomer components (especially monofunctional monomers) and the solubility of the non-photopolymerizable component in the polymer produced. If the non-photopolymerizable component has a relatively high solubility in monomer components, the non-photopolymerizable component may be biased towards regions where polymers with lower molecular weights are produced, i.e., regions where the intensity of the active ray hν is relatively high. When the concentration of the non-photopolymerizable component changes periodically due to this biased distribution, the electron density of the resin molded body 1 also changes periodically, and as a result, the resin molded body 1 is likely to exhibit periodically changing optical properties. For example, laser light transmitted through the resin molded body 1 may form a diffraction pattern that reflects the periodic structure of the resin molding material 1A.

[0021] Figure 3 is a schematic diagram showing an example of a periodic structure in a resin molded article. Figure 3 is an example of a periodic structure that can be formed in a resin molded article 1 by polymerization-induced phase separation when the resin molding material 1A contains monomer components and non-photopolymerizable components. The periodic structure 10 shown in Figure 3 is a phase-separated structure comprising a first phase 41 and a second phase 42. The first phase 41 is an island-like phase mainly containing low molecular weight polymers 21, and can be formed at positions corresponding to the bright spots of active light hν and their vicinity. The second phase 42 is a sea-like phase mainly containing high molecular weight polymers 22, and can be formed at positions where the intensity of active light hν is relatively low. A periodic structure is formed in which a certain pattern is repeated between the first phase 41 and the second phase 42. The non-photopolymerizable component 30 is biased to be distributed in the first phase 41 containing low molecular weight polymers 21. As a result, the concentration of the non-photopolymerizable component 30 changes periodically. The second phase 42 may contain the non-photopolymerizable component 30 at a relatively low concentration.

[0022] The compatibility between a non-photopolymerizable component and a monomer component or polymer can be evaluated based on solubility parameters. For example, the solubility parameter of the non-photopolymerizable component may be inside the compatibility sphere determined by the solubility parameter of the monomer component, and outside the compatibility sphere determined by the solubility parameter of the polymer formed by the polymerization of the monomer component. Here, the solubility parameter can be Hansen's solubility parameter (HSP), which is represented as a plot in three-dimensional space based on the intermolecular interactions of three components: δD based on van der Waals forces, δP based on dipole moments, and δH based on hydrogen bonding forces.

[0023] The compatibility spheres, determined by the solubility parameters of the monomer components and the polymers used for compatibility evaluation, are: Prepare 28 types of measurement solvents with known solubility parameters, Add 0.2 g of the monomer component or polymer sample for compatibility evaluation to 0.6 mL of each measurement solvent. After allowing the sample to stand in the measurement solvent at 25°C for 24 hours, if the sample is completely dissolved in the measurement solvent or has swollen due to the measurement solvent, the measurement solvent is judged to be a good solvent. If the sample is neither completely dissolved nor swollen, the measurement solvent is judged to be a poor solvent. The solubility parameters of each measurement solvent are determined by a method that includes plotting them on a Cartesian coordinate system with three axes: δD based on van der Waals forces, δP based on dipole moment, and δH based on hydrogen bonding force, and determining the compatible sphere by fitting a sphere containing the coordinates of the measurement solvents determined to be good solvents using the least squares method. The 28 solvents for measurement are acetone, acetonitrile, 1-butanol, n-butyl acetate, γ-butyrolactone, carbon tetrachloride, chloroform, cyclohexane, diacetone alcohol, dibasic acid esters (a mixture of dimethyl succinate, dimethyl glutarate, and dimethyl adipate), diethyl ether, diethylene glycol, N,N'-dimethylformamide, dimethyl sulfoxide, 1,4-dioxane, dipropylene glycol, ethanol, ethyl acetate, methanol, methyl acetate, methyl ethyl ketone, methyl isobutyl ketone, N-methyl-2-pyrrolidone, dichloromethane, propylene carbonate, propylene glycol monoethyl ether, tetrahydrofuran, and toluene. When the monomer component of the sample contains multiple monomers, the compatible spheres are determined by a sample of the monomer component containing them in the same blending ratio as in the resin molding material 1A. The polymer sample for compatibility evaluation can be a polymer formed by irradiating the resin molding material 1A containing the monomer component with active light of uniform intensity.

[0024] The solubility parameter of the non-photopolymerizable component may be located inside the compatibility sphere of the monomer component's solubility parameter, and outside the compatibility sphere of the compatibility parameter of the compatibility evaluation polymer formed by the polymerization of the monomer component, in the same orthogonal coordinate system as the compatibility sphere of the monomer component or the compatibility evaluation polymer. If the solubility parameter of the non-photopolymerizable component is unknown, the compatibility sphere of the non-photopolymerizable component may be determined in the same way as the compatibility spheres of the monomer component and the compatibility evaluation polymer, and the center of that compatibility sphere may be considered as the solubility parameter of the non-photopolymerizable component.

[0025] The non-photopolymerizable component may include a photopolymerization initiator. The photopolymerization initiator may include, for example, one or more selected from diallyl ketone compounds, benzoin compounds, benzyl ketal compounds, α-hydroxyacetophenone compounds, α-aminoacetophenone compounds, acylphosphine oxide compounds, quinone compounds, and thioxanthone compounds. An example of a diallyl ketone compound is benzophenone. For example, a combination of a monomer component containing one or more monomers selected from compounds having an acrylamide group, compounds having a methacrylamide group, acrylic acid esters, and methacrylic acid esters, and one or more photopolymerization initiators selected from diallyl ketone compounds, benzoin compounds, benzyl ketal compounds, α-hydroxyacetophenone compounds, α-aminoacetophenone compounds, acylphosphine oxide compounds, quinone compounds, and thioxanthone compounds readily forms a resin molded article 1 containing a periodic structure by polymerization-induced phase separation. Compounds generated by the photoreaction of the photopolymerization initiator can be distributed in the resin molded article 1 as non-photopolymerizable components at concentrations that change periodically.

[0026] The content of the photopolymerization initiator or non-photopolymerizable component may be, for example, 1 mol% to 50 mol% relative to the amount of monomer component.

[0027] The non-photopolymerizable component may contain a plasticizer. The non-photopolymerizable component may contain a photopolymerization initiator and a plasticizer. The plasticizer is a compound that reduces the elastic modulus of the resin molded article 1. Examples of plasticizers include alkyl phthalate compounds such as bis(2-ethylhexyl) phthalate, adipic acid ester compounds, phosphate ester compounds, trimet acid ester compounds, citrate ester compounds, polyester compounds, epoxidized vegetable oils, sebacate acid ester compounds, azelaic acid ester compounds, maleic acid ester compounds, and benzoic acid ester compounds. The plasticizer may also be distributed in the resin molded article 1 at concentrations that change periodically based on differences in compatibility.

[0028] The plasticizer content may be, for example, 0.1% by mass or more and 30% by mass or less, relative to the amount of monomer components.

[0029] The resin molded body 1 formed by irradiation with active light hν may be removed from the mold 50. The resin molded body 1 removed from the mold 50 may be a solid or a gel at 25°C. The resin molded body 1 may be a rubber-elastic body at 25°C.

[0030] The periodic structure of the resin molded body 1 can be confirmed, for example, by the diffraction pattern formed by laser light passing through the resin molded body 1. Figure 4 is a schematic diagram showing an example of a method for generating a diffraction pattern of laser light on the resin molded body 1. In the method of Figure 4, a laser light source 70 is placed on one main surface side of the resin molded body 1 (for example, the light-receiving surface S1 side), and a detection surface S2 is placed on the other main surface side of the resin molded body 1. When laser light 71 from the laser light source 70 is irradiated onto the resin molded body 1, a regular diffraction pattern is formed on the detection surface S2 by scattered light 75, which is the laser light that has passed through the resin molded body 1. The wavelength of the laser light 71 may be, for example, 532 nm.

[0031] The size of the periodic structure in the resin molded body 1 can also be estimated from the diffraction pattern on the detection surface S2. For example, if the width of the repeating constituent units that form a periodic structure is x, the shortest distance between the resin molded body 1 and the detection surface S2 is L2, and the interval between bright spots in the diffraction pattern is D, then the width x of the constituent units can be determined by the following formula. 2xD / L2 = nλ

[0032] The width x of the constituent units obtained from the diffraction pattern may be, for example, 100 nm or more, 200 nm or more, or 300 nm or more, or it may be 100 μm or less.

[0033] By utilizing the optical properties based on the periodic structure of the resin molded body 1, the resin molded body 1 can be applied to various optical components. For example, the resin molded body 1 can be used as a photonic material. [Examples]

[0034] The present invention is not limited to the following embodiments.

[0035] Example 1 1.Irradiation device A UV irradiation device was prepared having a configuration similar to the example in Figure 2, comprising a substrate and multiple LED elements that serve as a light source for ultraviolet light with a wavelength of 365 nm, with the LED elements arranged in a grid pattern on the substrate. The LED elements were arranged in a grid pattern so as to form rows along mutually orthogonal vertical and horizontal directions. There were 10 LED elements in the vertical rows and 11 in the horizontal rows. The distance between the centers of adjacent LED elements in the vertical or horizontal rows (d x d y The distance between the centers of adjacent LED elements in the diagonal direction (at a 45° angle to the vertical direction) was 12 mm. xy The distance was 17 mm. Regarding the interference pattern at a distance of 10 cm from the LED element, the spacing between bright spots was estimated to be 1.8 μm or 1.2 μm.

[0036] 2. Molding Test A liquid resin molding material was prepared by dissolving benzophenone, used as a photopolymerization initiator, in N-(methoxymethyl)acrylamide (MOMA) as a monomer component. The amount of benzophenone was approximately 15 mol% relative to the amount of MOMA.

[0037] A mold was prepared having two transparent glass plates, which were arranged parallel to each other with a gap of approximately 0.5 mm between them. A resin molding material was poured between the two transparent glass plates of the mold. The resin molding material formed a sheet-like shape with one of the contact surfaces with the transparent glass plate serving as a flat light-receiving surface. A UV irradiation device was positioned so that the substrate was parallel to the glass plates of the mold and the shortest distance between the LED element and the resin molding material was 10 cm. The resin molding material inside the mold was irradiated with a UV intensity of approximately 230 mW / cm² using the UV irradiation device. 2 The material was irradiated with ultraviolet light for 900 seconds. The irradiation with ultraviolet light formed a sheet-like resin molded body containing a polymer of monomer components.

[0038] 3. Evaluation When the resin molded body was observed under visible light, structural coloration, where the color changes depending on the position, was observed. A 532 nm wavelength laser beam was irradiated onto the resin molded body sandwiched between two glass plates, and a diffraction image of the laser beam transmitted through the resin molded body was obtained. Figure 5 shows the diffraction image of the laser beam transmitted through the resin molded body. Diffraction patterns originating from periodic structures of several sizes in the resin molded body were observed. From the distance between the bright spots in the diffraction pattern, the width of the constituent units of the periodic structures was estimated to be 1.1 to 1.9 μm.

[0039] The surface of the resin molded body was observed using an electron microscope. Figure 6 shows the reciprocal space image generated by Fourier transform from the electron microscope image of the resin molded body surface. The reciprocal space image contained a pattern consistent with the diffraction pattern. The electron microscope image of the resin molded body surface was analyzed using two-dimensional light-dark mapping with image processing software (ImageJ). Figure 7 shows the two-dimensional light-dark mapping image of the resin molded body surface. It was confirmed that the light and dark peaks were arranged periodically at intervals of approximately 1.5 μm. These analysis results also support the formation of a periodic structure in the resin molded body.

[0040] Examples 2-6 (Other Monomers) A resin molded article was prepared in the same manner as in Example 1, except that the following monofunctional monomers were used instead of MOMA. Benzyl acrylate (Example 2) N-(3-dimethylamino)propylacrylamide (Example 3) N-(3-dimethylamide)propyl methacrylamide (Example 4) 2-[2-(2-methoxyethoxy)-ethoxy]ethyl acrylate (Example 5) Tetrahydrofluryl acrylate (Example 6)

[0041] Resin molded articles obtained from each monofunctional monomer exhibited structural color under visible light observation and showed laser light diffraction patterns originating from their periodic structures.

[0042] Example 8 (Crosslinking agent) To the molding material of Example 1, 1 mol% of N,N'-methylenebisacrylamide (MBAA) relative to the amount of MOMA was added as a crosslinking agent to obtain the molding material of Example 8. Resin molded articles were prepared using only this molding material. The obtained resin molded articles exhibited structural coloration under visible light observation and showed a laser light diffraction pattern originating from the periodic structure.

[0043] Example 9 (Plasticizer) To the molding material of Example 1, 10% by mass of bis(2-ethylhexyl) phthalate relative to the amount of MOMA was added as a plasticizer to obtain the molding material of Example 9. Resin molded articles were prepared using only this molding material. The obtained resin molded articles exhibited structural coloration under visible light observation and showed a laser light diffraction pattern originating from the periodic structure. [Explanation of Symbols]

[0044] 1A...Resin molding material, 1...Resin molded body, 10...Periodic structure, 21...Low molecular weight polymer, 22...High molecular weight polymer, 41...First phase, 42...Second phase, 30...Non-photopolymerizable component, 60...Light irradiation device, 61...Substrate, 62...Light source, 71...Laser light, 75...Scattered light, d x d xy d y ...distance between light sources, hν...active ray, S1...photosensitive surface, x...width of the constituent unit of the periodic structure.

Claims

1. To form a shape having a light-receiving surface in a resin molding material containing a photopolymerizable monomer component, The light-receiving surface is irradiated with active light, thereby forming a resin molded article containing a polymer formed by a reaction including polymerization of the monomer components. Includes, The intensity of the activated light has a distribution that changes periodically on the light-receiving surface. A method for manufacturing a resin molded product.

2. The method according to claim 1, wherein the intensity of the active light has a distribution on the light-receiving surface that changes periodically due to the interference of light from multiple light sources.

3. The method according to claim 2, wherein a plurality of the light sources are arranged in a two-dimensional grid.

4. The method according to claim 3, wherein the minimum distance between adjacent light sources is 2 mm or more and 5 mm or less.

5. The resin molding material further contains a non-photopolymerizable component, The solubility parameter of the non-photopolymerizable component is located inside the compatible sphere determined by the solubility parameter of the monomer component, and outside the compatible sphere determined by the solubility parameter of the polymer for compatibility evaluation formed by the polymerization of the monomer component. The method according to claim 1.

6. The method according to claim 5, wherein the non-photopolymerizable component includes a photopolymerization initiator.

7. The method according to any one of claims 1 to 6, wherein the resin molded body has a periodic structure that generates a diffraction pattern of laser light.

8. Contains polymers, It forms a periodic structure that produces a diffraction pattern of laser light. The polymer includes homopolymers, random copolymers, or both. Resin molded body.

9. The resin molded article further contains a non-photopolymerizable component, The resin molded article according to claim 8, wherein the periodic structure includes a portion in which the concentration of the non-photopolymerizable component changes periodically.

10. The resin molded article according to claim 8, wherein the periodic structure includes a portion in which constituent units having a width of 100 nm or more are repeated.

11. An optical component comprising a resin molded body according to any one of claims 8 to 10.

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