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| HDPE 軒源塑膠供應 | 北歐化工 | HE3366 |
HDPE與韌性好模量低的樹脂共混
HDPE and good toughness of low modulus resin blends
HDPE/LLDPE(線型低密度聚乙烯)、HDPE/CPE(氯化聚乙烯)、HDPE/EVA(乙烯一醋酸乙烯共聚物) 、HDPE/mPE(茂金屬聚乙烯)、HDPE/PVA(聚乙烯醇)短纖維共混體系等。
HDPE/LLDPE (linear low density polyethylene), HDPE/CPE (chlorinated polyethylene), HDPE/EVA (ethylene vinyl acetate copolymer (HDPE/mPE), bllocene polyethylene), HDPE/PVA (polyvinyl alcohol) fiber blend system.
添加增容劑
The addition of the compatibilizer
進行增韌改性時，提高基體與彈性體的相容性和兩相之間的粘結強度，穩(wěn)定分散相是必須面臨的問題，添加增容劑可很好的改善這一問題
Through toughening modification, to improve the bond strength between compatibility and phase matrix and elastic body, stable dispersed phase is facing problems, adding compatibilizer can well solve this problem
題。李愛英等人研究的HDPE／NBR體系，以HDPE一g一MA為增容劑，顯著降低了共混物組分間的界面張力，大大提高了兩相之間的粘合強度，穩(wěn)定了分散相，抑制了顆粒的聚結，減小了分散相的尺寸。當HDPE／NBR／HDPE一g一MA=75/25/10時，沖擊性能最好，沖擊強度從HDPE的約60J/m2 提高至將800J/m2，是HDPE的13.3倍.
Questions. Li Aiying et al. Study of HDPE / NBR system, taking HDPE g MA as compatibilizer, significantly reduces the interfacial tension between the blend components, greatly improving the adhesion strength between the two, stabilize the dispersed phase, inhibiting the particle coalescence, reduced the size of dispersed phase. When the HDPE / NBR / HDPE g MA=75/25/10, the best impact properties, impact strength from about 60J/m2 HDPE to the 800J/m2, is 13.3 times that of HDPE
利用紫外線輻射也可提高基體的增容作用。空氣中經(jīng)紫外輻照
Using ultraviolet radiation can also improve compatibilization matrix. The air with ultraviolet radiation
后，HDPE分子鏈上引入了一C(C=O)CH3，一CH2C(=O)CH2一，一C(=O)O一等含氧官能團，實現(xiàn)了HDPE的官能化。使HDPE分子量下降、熔點降低、結晶度增大并產(chǎn)生凝膠。隨環(huán)境溫度提高，HDPE官能化速度加快。但過度紫外輻照的HDPE對HDPE中VA體系的增容效果并不好，反而引起共混物的缺口沖擊強度下降.
After introduced into the molecular chains of HDPE, a C (C=O) CH3, CH2C (=O) CH2, C (=O) O oxygen containing groups, the functionalized HDPE. The molecular weight of HDPE was decreased, low melting point, crystallinity and produce gel. With environmental temperature increasing, HDPE functionalized speed. But the compatibilizing effect of excessive ultraviolet radiation of HDPE on VA system in HDPE is not good, but decrease the Izod notched impact strength of the blend
| HDPE 軒源塑膠供應 | 北歐化工 | HE3366 |
Chemical and physical properties:
PE-HD的高結晶度導致了它的高密度，抗張力強度，高溫扭曲溫度，粘性以及化學穩(wěn)定性。
PE-HD high crystallinity led to its high density, tensile strength, high temperature distorting temperature, viscosity and chemical stability.
PE-HD比PE-LD有更強的抗?jié)B透性。
Permeability of PE-HD is more than PE-LD.
PE-HD的抗沖擊強度較低。
The impact strength of PE-HD lower.
PH-HD的特性主要由密度和分子量分布所控制。適用于注塑模的PE-HD分子量分布很窄。
The characteristics of PH-HD mainly by the density and the molecular weight distribution control. The molecular weight distribution of PE-HD suitable for injection mold is very narrow.
對于密度為0.91~ 0.925g/cm3，我們稱之為第一類型PE-HD；
The density of 0.91~ 0.925g/cm3, which we call the first type PE-HD;
對于密度為0.926~ 0.94g/cm3，稱之為第二類型PE-HD；
The density of 0.926~ 0.94g/cm3, called the second type PE-HD;
對于密度為0.94~ 0.965g/cm3，稱之為第三類型PE-HD。該材料的流動特性很好，MFR為0.1到28之間。分子量越高，PH-LD的流動特性越差，但是有更好的抗沖擊強度。
The density of 0.94~ 0.965g/cm3, called the third type PE-HD. The flow characteristics of the material is very good, MFR is between 0.1 to 28. The higher the molecular weight, the flow characteristics of PH-LD worse, but better impact strength.
PE-LD是半結晶材料，成型后收縮率較高，在1.5%到4%之間。
PE-LD is a semi crystalline materials, molding shrinkage rate is higher, at 1.5% to 4%.
PE-HD很容易發(fā)生環(huán)境應力開裂現(xiàn)象?？梢酝ㄟ^使用很低流動特性的材料以減小內(nèi)部應力，從而減輕開裂現(xiàn)象。PE-HD當溫度高于60C時很容易在烴類溶劑中溶解，但其抗溶解性比PE-LD還要好一些。
PE-HD is prone to environmental stress cracking phenomenon. Through the use of very low flow characteristics of materials to reduce the internal stress, thereby reducing the cracking phenomenon. PE-HD when the temperature is higher than 60C easily in hydrocarbon solvent, but its solvent resistance are better than PE-LD some.
| HDPE 軒源塑膠供應 | 北歐化工 | HE3366 |
HDPE and elastomer blend
彈性體是具有低的表面張力、較強的極性、具有突出的增韌作用。主要的增韌體系有:HDPE/EPDM(三元乙丙橡膠)、HDPE/EOR(乙烯一辛烯共聚物)、HDPE/NBR(丁腈橡膠)、HDPE/SBR(丁苯橡膠)、HDPE/IIR(丁基橡膠)、HDPE/硫化膠粉、HDPE/廢膠粉、HDPE/SBS (苯乙烯一丁二烯三嵌段共聚物)等。
Elastic body with low surface tension, strong polarity, with prominent toughening effect. The main toughening system: HDPE/EPDM (three EPDM), HDPE/EOR (ethylene octene copolymer), HDPE/NBR (Ding Jing rubber), HDPE/SBR (styrene butadiene rubber), HDPE/IIR (Ding Ji HDPE/ vulcanized rubber powder, rubber), HDPE/ HDPE/SBS (a waste rubber powder, styrene diene three block copolymer) etc..
彈性體和/或韌性好模量低的樹脂增韌
Elastic and / or good toughness of low modulus resin toughening
研究表明，HDPE／NBR共混物的沖擊斷面呈平行排列的絲狀結構，可認為是試樣斷裂時銀紋擴展為裂紋留下的痕跡，NBR以微細結構分散于HDPE中，當受力后能引發(fā)大量銀紋，使共混物顯示高的沖擊性能。
Research shows that, the impact fracture surface of HDPE / NBR blends was filamentous structures arranged in parallel, can be thought of as the test specimens craze extended to crack traces, NBR to fine structure dispersed in HDPE, when the force can cause a lot of craze, the blends show the impact of higher energy.
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