描述

聚甲基丙烯酸甲酯塑料材料

PMMA塑料材料

优良的透明度和优异的耐老化性

PMMA具有重量轻、成本低、易于成型的优点

PMMA塑料材料

产品详细信息

聚甲基丙烯酸甲酯塑料材料。透明度：PMMA是一种无定形聚合物。内部分子的排列不会干扰光通过每个部分时进入它的速度，因此它可以使光以相同的速度传播（即均匀折射率）。分散四周的光线，相互干扰。因此，PMMA具有优异的光学性能和高透光率（90~92%，取决于波长）。表面非常光滑的薄片或杆，即使弯曲到一定的极限，从一端入射的所有光都可以在其内部反射，然后从另一端发射，就像流经管道的水一样（一定的曲率是指弯曲位置与原始位置之间的角度，不能超过42°；当弯曲为弧形时，圆弧半径必须大于杆直径或板材厚度的3倍）。但当表面的某一部分被打磨时，光线可以从这里逃逸出来，并显示出光线。此功能可用于制造边缘发射装置、外科医疗器械等。2.机械性能：PMMA的机械强度是普通玻璃的10倍以上，但与其他塑料相比，强度适中。其缺点是轻脆、易开裂（或银纹）、表面硬度低、易划伤和失去光泽；耐磨性差，两者之间的静摩擦系数为0.8，钢的动摩擦系数为0.45~0.50，容易划伤和起砂。3.电气性能：PMMA的电气性能良好，尤其是在低频工作条件下。然而，它的一些电特性是独特的：介电损耗正切值随频率的增加而减小。温度和频率对介电常数有影响，而气候和湿度对电气性能几乎没有影响。但电气性能比PE、PS等差。热性能：PMMA的耐热性不够好，使用温度仅为80°C，单体可与丙烯酸乙二醇酯或甲基丙烯酸丙烯酯共聚交联，提高耐热性。聚甲基丙烯酸甲酯的比热低于大多数热塑性塑料，这有利于其通过加热快速塑化。此外，它还具有一定的耐寒性，在-50至-60℃的低温下，冲击强度变化不大。5.化学性能：PMMA具有一定的耐化学性，但随着温度的升高，耐化学性减弱。耐气体化学性强，长期接触臭氧和二氧化硫，不发生腐蚀；氯气会腐蚀它的表面。可溶于乙酸乙酯或丁酯、冰醋酸、氯仿、苯等。；它能吸收各种含酒精的有机化合物，使体积膨胀，表面粗糙多毛，但不溶于脂肪族化合物。6.耐候性：耐候性极佳，在热带气候中暴露多年后，透明度和颜色变化很小

请立即联系我们，了解更多有关塑料材料的详细信息

是一家专业的pmma塑料材料制造商，您可以从我们工厂以优惠的价格订购高品质的pmma塑料材料

PMMA Plastic Material

.
PMMA Plastic Material
Excellent transparency and outstanding aging resistance
PMMA has the advantages of light weight, low cost and easy molding.

PMMA Plastic Material

Product Details

PMMA plastic material

1. Transparency: PMMA is an amorphous polymer. The arrangement of its internal molecules will not interfere with the speed of the light entering it when passing through each part, so it can make the light go at the same speed (ie uniform refractive index). Disperse the light on all sides and interfere with each other. Therefore, PMMA has excellent optical properties and high light transmittance (90~92%, depending on the wavelength). A sheet or rod with an extremely smooth surface, even when bent to a certain limit, all the light incident from one end can be reflected in its interior, and then emitted from the other end, just like water flowing through a pipe (a certain Curvature refers to the angle between the bent position and the original position, which cannot exceed 42°; when the bend is in an arc shape, the arc radius must be greater than 3 times the diameter of the rod or the thickness of the sheet). But when a certain part of the surface is sanded, light can escape from here and show light. This feature can be used to manufacture edge-emitting devices, surgical medical instruments, and so on. 2. Mechanical properties: The mechanical strength of PMMA is more than 10 times higher than that of ordinary glass, but the strength is only moderate compared with other plastics. Its shortcomings are light and brittle, easy to crack (or silver streaks), low surface hardness, easy to scratch and lose gloss; poor wear resistance, the static friction coefficient between them is 0.8, and the dynamic friction coefficient for steel is 0.45~0.50, so it is easy to scratch and sand. 3. Electrical performance: The electrical performance of PMMA is good, especially under low-frequency working conditions. However, some of its electrical properties are unique: the dielectric loss tangent value decreases with increasing frequency. Temperature and frequency have an effect on the dielectric constant, while climate and humidity have little effect on electrical performance. But the electrical performance is worse than PE, PS, etc. 4. Thermal performance: The heat resistance of PMMA is not good enough, and the use temperature is only 80°C. The monomer can be copolymerized and cross-linked with ethylene glycol acrylate or propylene methacrylate to improve heat resistance. The specific heat of PMMA is lower than that of most thermoplastics, which facilitates its rapid plasticization by heat. In addition, it also has a certain degree of cold resistance, and the impact strength changes little at low temperatures of -50 to -60 ℃. 5. Chemical properties: PMMA has certain chemical resistance, but it weakens with the increase of temperature. Strong chemical resistance to gas, long-term contact with ozone and sulfur dioxide, no corrosion occurs; chlorine gas can corrode its surface. It can be dissolved in ethyl acetate or butyl ester, glacial acetic acid, chloroform, benzene, etc.; it can absorb various alcoholic organic compounds, so that the volume expands, the surface is rough and hairy, but it is insoluble in aliphatic compounds. 6. Weather resistance: It has excellent weather resistance, with little transparency and color change after years of exposure in tropical climates.

ContactnowformoredetailsaboutPMMA plastic material.

Kitty Liu< ###>

is one of the professional pmma plastic material manufacturers, you can order high quality pmma plastic material at good price from our factory.