RVT硅橡膠原材料2023/9/18RVT硅橡膠原材料[1]簡介1940年G．Rochow發(fā)明了用硅和氯甲烷直接合成甲基氯硅烷的方法，開始了從實驗室向工業(yè)生產(chǎn)的轉(zhuǎn)化。1944年美國General

Electric公司合成聚二甲基硅氧烷。1945美國DowCorning公司研究的商品硅橡膠SR-73和SR-74問世，但質(zhì)量差，至1948年J．E．Nyde等人得到高質(zhì)量的聚合物將其取代。使用氣相法白炭黑為補強填料，有機過氧化物作硫化催化劑，得到了強韌的實用硅橡膠，從而使二甲基硅橡膠的性能達到實用階段。RVT硅橡膠原材料[1]第十節(jié) 硅橡膠簡介1948年甲基乙烯基硅橡膠研制成功。1951年又開發(fā)成功苯基硅橡膠。隨之又研究開發(fā)出室溫硫化的硅橡膠，此后又相繼研制開發(fā)成功腈硅橡膠、氟硅橡膠等。1966年又成功地研制出聚碳硼烷硅氧烷橡膠，可在約400℃下使用。目前有機硅產(chǎn)品大致分為四大類：硅油及其衍生物、硅橡膠、硅樹脂和官能有機硅烷，前三類通稱為聚硅氧烷材料。RVT硅橡膠原材料[1]第十節(jié) 硅橡膠第十節(jié) 硅橡膠RVT硅橡膠原材料[1]第十節(jié) 硅橡膠一、硅橡膠（Silicone

Rubber/Q）1、什么是硅橡膠是由各種二氯硅烷經(jīng)過水解、縮聚而得到的一種元素有機彈性體。RVT硅橡膠原材料[1]Silicone

RubberRVT硅橡膠原材料[1]2、硅橡膠的分類品種⑴、按硫化溫度⑵、按化學結(jié)構(gòu)分⑶、按不同特性分RVT硅橡膠原材料[1]第十節(jié) 硅橡膠⑴、按硫化溫度分高溫硫化或熱硫化型和室溫硫化型兩類高溫硫化型，即HTV型，為高分子量的固體橡膠，成型硫化的加工工藝和普通橡膠相似。室溫硫化型，即RTV型，是低分子量的有活性端基或側(cè)基

的液體橡膠，在常溫下即可硫化成型，RTV又分為雙組分

RTV硅橡膠（簡稱RTV-2）和單組分RTV硅橡膠（簡稱

RTV-1）。RVT硅橡膠原材料[1]第十節(jié) 硅橡膠⑵、按化學結(jié)構(gòu)分引入側(cè)基可顯著地改進其物理機械性能、耐溫性能和加工性能。根據(jù)硅橡膠的側(cè)基不同主要有：二甲基硅橡膠、甲基乙烯基硅橡膠、甲基苯基乙烯基硅橡膠、三氟丙基甲基乙烯基硅橡膠、腈硅橡膠RVT硅橡膠原材料[1]第十節(jié) 硅橡膠第十節(jié) 硅橡膠二甲基硅橡膠（MQ）二甲基硅橡膠簡稱甲基硅橡膠，是硅橡膠中最老的品種；能在－60～250℃范圍內(nèi)保持良好彈性，但其硫化活性低，工藝性能差，厚壁制品在二段硫化時易發(fā)泡，高溫壓縮變形大等；目前除少量用于織物涂復(fù)外，已被甲基乙烯基硅橡膠所取代。RVT硅橡膠原材料[1]甲基乙烯基硅橡膠（VMQ）MVQ簡稱乙烯基硅橡膠，是由二甲基硅氧烷與少量乙烯基硅氧烷共聚而成，乙烯基含量一般為0.1～0.3mol％；在硅橡膠生產(chǎn)中，甲基乙烯基硅橡膠是產(chǎn)量最大，應(yīng)用最廣，品種牌號最多的。第十節(jié) 硅橡膠RVT硅橡膠原材料[1]第十節(jié) 硅橡膠甲基乙烯基苯基硅橡膠（PVMQ）甲基乙烯基苯基硅橡膠簡稱苯基硅橡膠；它是在乙烯基硅橡膠的分子鏈中引入二苯基硅氧烷鏈節(jié)而制成的。引入大體積的苯基破壞二甲基硅氧烷結(jié)構(gòu)的規(guī)整性，降低聚合物的結(jié)晶溫度和玻璃化溫度。RVT硅橡膠原材料[1]第十節(jié) 硅橡膠甲基乙烯基三氟丙基硅橡膠（FVMQ）甲基乙烯基三氟丙基硅橡膠簡稱氟硅橡膠(FVMQ)，它是在乙烯基硅橡膠的分子鏈中引入氟代烷基；主要特點是具有優(yōu)良的耐油；氟硅橡膠的耐溫性能較乙烯基硅橡膠要差一些，工作溫度范圍約為-50～250℃。RVT硅橡膠原材料[1]第十節(jié) 硅橡膠腈硅橡膠（NVMQ）腈硅橡膠（NVMQ）主要是在分子鏈中含有甲基-β-腈乙基硅氧

鏈節(jié)或甲基-γ-腈丙基硅氧鏈節(jié)的一種彈性體；其主要特點與氟硅橡膠相似：即耐油、耐溶劑，并具有良好的耐低溫性能。RVT硅橡膠原材料[1]第十節(jié) 硅橡膠RVT硅橡膠原材料[1]⑶、按不同特性分RVT硅橡膠原材料[1]第十節(jié) 硅橡膠1通用型5低壓縮永久變形型9導(dǎo)電性硅橡膠2高強度型6電線、電纜型10熱收縮型3耐高溫型7耐油耐溶劑型11不用二段硫化型4低溫型8阻燃型12海綿硅橡膠第十節(jié) 硅橡膠二、硅橡膠的結(jié)構(gòu)1、非極性橡膠2、飽和橡膠3、分子柔順性好4、能夠結(jié)晶RVT硅橡膠原材料[1]Q’s

Properties——1、Thermal

Stability第十節(jié) 硅橡膠三、硅橡膠的性能1、卓越的耐高、低溫性能工作溫度范圍-100~350℃RVT硅橡膠原材料[1]2、

AgeingResistance第十節(jié) 硅橡膠2、優(yōu)異的耐臭氧老化、耐氧老化、耐光老化和耐天候老化性能硅橡膠硫化膠在自由狀態(tài)下置于室外數(shù)年性能無變化。RVT硅橡膠原材料[1]3、Electricity第十節(jié) 硅橡膠3、優(yōu)良的電絕緣性能硅橡膠的電絕緣性能在受潮、頻率變化或溫度升高時的變化較小，燃燒后生成的SiO2仍為絕緣體；硅橡膠分子結(jié)構(gòu)中碳原子少，且不用碳黑作填料，所以在電弧放電時不易發(fā)生焦燒，因而在高壓場合使用它十分可靠；它的耐電暈性和耐電弧性極為良好，耐電暈壽命是聚四氟乙烯的1000倍，耐電弧壽命是氟橡膠的20倍。RVT硅橡膠原材料[1]4:Surface第十節(jié) 硅橡膠4、特殊的表面性能和

生理惰性硅橡膠的表面能比大多數(shù)有機材料低，它具有低吸濕性，長期浸于水中其吸水率僅1％左右，物理機械性能

不下降，防霉性能良好；此外，它的許多材料不黏，可起隔離作用。硅橡膠無味、無毒，對人體無不良影響，與機體組織反應(yīng)輕微，具有優(yōu)良生理惰性和生理老化性。RVT硅橡膠原材料[1]5:

Air

PermeabilityRVT硅橡膠原材料[1]第十節(jié) 硅橡膠5、高透氣性硅橡膠和其他高分子材料相比，具有極為優(yōu)越的透氣性；室溫下對N2、O2和空氣的透過量比NR高30～40倍；它還具有對氣體滲透的選擇性能；對O2的透過性是N2的一倍左右，CO2透過率為O2的5倍左右。RVT硅橡膠原材料[1]Applications第十節(jié) 硅橡膠RVT硅橡膠原材料[1]四、硅橡膠的應(yīng)用硅橡膠可以用于汽車配件、電子配件、宇航密

封制品

、

建筑工業(yè)的粘結(jié)縫、家用電器密封圈、醫(yī)用人造器官、導(dǎo)尿管等；在紡織高溫設(shè)備以及在堿、次氯酸鈉和雙氧水濃度較高的設(shè)備上作密封材料也取得良好的效益。第十節(jié) 硅橡膠RVT硅橡膠原材料[1]RVT硅橡膠原材料[1]RVT硅橡膠原材料[1]Silicon

rubber

tubeRVT硅橡膠原材料[1]RVT硅橡膠原材料[1]Features:Excellent

resistance

for

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to

oil

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tensile

strength,

tear

strength

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compression

setSusceptible

to

ozone,

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UV

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heatResistant

to

chemicalsRVT硅橡膠原材料[1]RVT硅橡膠原材料[1]Industrial

Roller

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Excellent

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siliconehigh-consistency

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層壓Laminating；Pinch捏,擰;夾General

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燃燒等級RVT硅橡膠原材料[1]Automotive

Turbocharger

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Intercooler

Hose

SolutionsOptimized

adhesion.

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Easyprocessing.Meet

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turbocharger

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intercoolerhosesRVTTu硅r橡b膠o原ch材a料r[g1]er渦輪增壓器RVT硅橡膠原材料[1]Design

fuel

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andprocessingadvantagesProven

SILASTIC?

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organic

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fuelresistance

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They

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Theclose

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The

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Being

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The

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RUBBER

HEATER

FEATURES:?(1)Precise

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)

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Density:

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Thermal

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in

graphic

imagingequipment;◆

Prevent

condensation

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Freeze

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Composite

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Semiconductor

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Food

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Airplane

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Medical

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blood

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test

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Curing

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Computer

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laser

printers,

duplicating

machines.Silicone

Rubber

HeatersRVT硅橡膠原材料[1]硅橡膠的分類與品種RVT硅橡膠原材料[1]通用型即一般強度型，采用乙烯基硅橡膠與補強劑等組成；硫化膠物理機械性能屬中等強度，拉伸強度為4.9～6.9MPa，伸長率為200％～300％；是用量最多，通用性最大的一種類型的膠料。硅橡膠的分類與品種RVT硅橡膠原材料[1]高強度型采用MVQ或低PMVQ橡膠，以比表面積較高的氣相白炭黑或經(jīng)過改性處理的白炭黑作補強劑，并加入適宜的加工助劑和特殊添加劑等綜合性配合改進措施，改進交聯(lián)結(jié)構(gòu)