In this thesis, the development of emulsion polymerization theory and related new technologies are comprehensively reviewed, and the synthetic technologies of acrylate latex modified by organosilicon both at home and abroad are also reviewed. based on the current development and research in this field, attentions of this study are focused on three ways for preparing novel acrylate latexes modified by organosilicons, that is, 1 ) the acrylate monomers are copolymerized with unsaturated silicons by emulsion copolymerization ; 2 ) a new latex with microphase separation morphology is synthesized, which shows a core - shell structure character ; 3 ) soap - free polymerization is explored for preparing a higher - performance latex using an unsaturated silicon monomer, different acrylates and a reactive emulsifier. by using techniques of delaying addition of organosilicon monomer and a hydrolysis inhibitor, the hydrolysis and condensation of 3 - ( trimethoxysilyl ) propyl methacrylate during polymerization can be effectively prevented, as a result, organosilicon content in the macromolecular chain is increased
同時採用有機
硅單體延遲滴加及添加水解抑制劑等技術,有效防止了-甲基丙烯酰氧基丙基三甲氧基
硅烷在乳液聚合過程中的過渡水解及縮合反應,提高了聚合物大分子鏈中有機
硅鏈節的含量;利用紅外光譜與差示掃描量熱儀對產物分子結構進行了表徵,並通過對共聚產物力學和吸水率的測試,證實了本研究所制備的有機
硅改性丙烯酸
酯共聚物具有比純丙烯酸
酯聚合物更優良的力學及耐水性能;從分子設計角度出發,利用醇解反應合成出水解、縮合反應速率較慢的兩種新型不飽和有機
硅單體: ?甲基丙烯酰氧基丙基三乙氧基
硅烷和?甲基丙烯酰氧基丙基三異丙氧基
硅烷;利用核磁共振對新型
硅烷單體結構進行了證實;研究表明利用新型
硅烷單體可以制備出高
硅烷含量的有機
硅改性丙烯酸
酯乳液,且其聚合產物具有較高的力學及耐水性能。
After vacuum concentrating and discoloring with 1. 5 % h2o2, then adding mixed fatty acid or mixed fatty acid ethyl ester as a fluidizing liquor, the hydrated rapeseed phosphatide can be mixed with 50 % soybean meal and 50 % diatomite to manufacture a premixed feed from rapeseed phosphatide, which can obviously improve the production performance when applied to feed giant freshwater prawn and duck
摘要菜籽水化磷脂經真空濃縮,用質量分數1 . 5 %雙氧水脫色,然後添加適量混合脂肪酸或混合脂肪酸乙
酯作流質劑,與50 %豆粕加50 %
硅藻土組成的混合載體製成磷脂預混飼料,用於飼喂羅氏沼蝦和蛋鴨,生產性能明顯提高。
Our product range for architectural applications includes : silicone sealants, two part polysulphide sealants for insulated glass, one part polyurethane sealants, acrylic sealants, butyl sealants, chemical anchor bolts, epoxy adhesives
我們的產品包括:
硅酮密封膠系列、聚氨
酯密封膠系列、建築錨固系列、中空玻璃聚硫膠及丁基膠系列、環氧樹脂系列、丙烯酸系列,覆蓋建材及汽車行業的六個大類,共幾十個品種。
Polyurethane aqueous dispersions modified with siloxanes
硅氧烷改性聚氨
酯水分散液
93012 nike remora iii goggle is a performance racing goggle, anti - fog shatterproof polycarbonate lenses, uv protection, neoprene and plastic gasket, three sizes of nose piece, double silicone head strap
專業游泳泳鏡,防碎的聚碳酸
酯纖維,防紫外線,氯丁膠和塑料墊圈,有3個鼻橋供您更換,雙重
硅膠泳鏡帶
Using the semi - batch synthesis techniques, a grafting reaction mechanism is adopted to prepare a core - shell composite latex of siloxane / acrylate based copolymer
利用接枝反應和種子溶脹半連續滴加技術合成了聚有機
硅氧烷聚丙烯酸
酯復合乳液。
Silicone polyesters resins are the reaction product of organo - siloxane intermediates and a suitable polyester resin intermediate ( typically characterized by the absence of drying oils )
硅改性聚
酯樹脂是有機
硅氧烷和相應的聚
酯樹脂中間產物反應而得到的產品。
Inorfil flame retardant coating for jet plane, zinc silicate primer, high temperature resistant coating, anticorrosion painting of epoxy asphalt glass squama, top - grade interior and exterior wall coating, ultralow surface treatment coating, industrial terrace coating, ethyl silicate
硅酸鋅塗料、耐高溫塗料、環氧瀝青玻璃鱗片防腐塗料、高檔內外墻塗料、超低表面處理塗料、工業地坪塗料、
硅酸乙
酯
Abstract : researches on unformaldehyde unironing finishing are summarized in this paper. functions and deficiencies of glyoralamido, water soluble heat reactive polyure thane, bishydroxyethyl - sulfoue, natural high precision chitosan, reactive organosilicon, amyloidosis epoxide, multiple carboxyl acid compound are also analyzed and compared
文摘:綜述了無甲醛免燙整理方面的研究,分析比較了乙二醛-酰胺類整理劑、水溶熱反應性聚氨
酯、雙羥乙基碸、天然高聚物殼聚糖、反應性的有機
硅、澱粉改性物、環氧類整理劑、多羧酸化合物等無甲醛抗皺整理劑的功能以及各種整理劑存在的不足
Ir, sem - edx, and water contact angle measurements on polysilane and polyacrylate film obtained by double operations and single operation showed that the influence of weight ratio of polymers, the molecular of pmma on film structure was great. the film translucence dropping while the ratio of pmma / pmts grew and the compatible reducing while the molecular of pmma increased
通過測定所配製的系列濃度聚合物甲苯溶液、 thf溶液的表面張力發現:有機
硅聚合物溶液的表面張力值在有機
硅聚合物濃度低於30時變化不明顯;而甲基丙烯酸
酯聚合物溶液表面張力值隨甲基丙烯酸
酯聚合物濃度的變化比有機
硅聚合物溶液明顯。
The experimental results further demonstrate that the combination of incompatibility polydimethylsiloxane and polyacrylate by co - vulcanization improves the both compatibility and broadens the low temperature and high temperature functional region. while in sin, to improve microphase structures and damping properties, the design to increase compatibility between two compositions and modulate crosslinking density as well as relative reaction rate of two compositions, is also effective
以上實驗結果表明,在復合橡膠阻尼材料中將聚
硅氧烷與聚丙烯酸
酯通過共混硫化相結合,改進了二者的相容性,拓寬了其阻尼功能區的低溫和高溫溫域;而在sin中通過改善組四川大學博士學位論文分間相容性,調節交聯密度控制其微相結構和兩種組分相對反應速度的快慢,進而控制材料阻尼性能的設計是行之有效的。
A two dimension small scale force sensor is developed which is used in the adhesion and friction tests, the sensor works well in the experiments. elastic modulus of nine different polyester / silicon rubber mixtures is tested, the results show that mixtures ’ elastic modulus increases with the aggrandizing of mass percentage of polyester. mixtures ’ adhesion abilitiy and especially mixture a ’ s adhesion - friction relationship are tested. these results provide experimental evidences for the fabricating of synthetic gecko hairs. lastly, a primary analysis of nanoscale hair modle is done, some hair preparation method is introduced, and the synthetic gecko foot hair fabricated by model moulding method is tested
測試九種不同配比聚氨
酯/
硅橡膠合成材料的彈性模量值,得出合成材料的彈性模量隨聚氨
酯質量百分比增加而增大的結論;對九種合成試樣進行了粘著性能測試,對實驗結果進行比較分析和討論;對粘著力最大的a試樣進行粘著力與摩擦力關系的實驗,得出粘著狀態下a試樣摩擦力與粘著力成線性關系的結論。
Study on synthesis and particle size of polysiloxane modified polyurethane latex
聚
硅氧烷改性聚氨
酯的合成及乳液粒徑的研究
Citric acid, taking the place of hno3, solutes the substance which does not solute in solution, and it acts as the ligand of metallic ionic and the hydrolysis catalyst of si ( oc2h5 ) 4, which reduces the pollution caused by no2 which forms at the decompose process of the hot treatment. by changing the means of calcine of the drier gel, choosing the suitable temperature to burn the gel, the high temperature calcine time is shorted, which solves the question of the long period calcine. so the preparation process of the matrix and composite was finished by using more lower temperature than the traditional solid state reaction and more shorter time than the traditional sol - gel process
結果使基質和復合物的制備在比傳統的固相反應法低得多的溫度下和比常規的溶膠凝膠法短得多的時間里完成;五、對基質及復合物的干凝膠、粉體和燒結體進行了ir 、 dta 、 xrd 、 seni及交流阻抗譜表徵,研究結果表明:在溶膠向凝膠的轉化過程中同時存在著正
硅酸乙
酯自身的聚合作用和檸檬酸鹽絡合物之間的聚合作用:干凝膠向產物粉體的轉化在400600c之間進行;基質li 。
Besides, it was founded that the compatible of the system consisted of mts - mma copolymer and pmma was better than that of pmts / pmma
應用dma , dsc , uv及水滴接觸角等測試手段表徵了有機
硅聚合物-聚甲基丙烯酸
酯梯度膜的性能。
Then properties of the polysilane - polyacrylate gradient films were characterized. the mechanism of film forming process of polysilane - polyacrylate fgm was probed into as well
並對所制得的有機
硅聚合物-聚甲基丙烯酸
酯梯度膜的性能進行了表徵,對其成膜機理進行了探討。
To prepare the functionally gradient materials ( fgm ) of polysilane - polyacrylate, the method of solution preparation was performed. based on the results of the back - scattered electron images and linear scanning of the polysilane - polyacrylate film ' s cross section, the dependence of polysilane - polyacrylate film ' s structure on molecules of polysilane and polyacrylate, pmma / pmts feed ratio and component concentration were investigated
通過測試有機
硅聚合物-聚甲基丙烯酸
酯樹脂膜的結構,分析了聚有機
硅( pmts ) 、聚甲基丙烯酸
酯( pmma )的分子量、 pmma pmts體系配比、組分濃度等因素對有機
硅聚合物-聚甲基丙烯酸
酯樹脂膜結構的影響。
The utilization of organosilicon which has higher bond energy and lower surface energy to modify the acrylate latex can markedly improve and enhance those properties mentioned above for acrylate polymers, and to date, it has become one of the most important research directions in this field
利用鍵能較高、表面能較低的有機
硅組分改性丙烯酸
酯乳液,提高丙烯酸
酯聚合物的耐高、低溫性及耐水性能,已成為丙烯酸
酯乳液改性的重要方法。
However, most of those flame retardants will reduce the other properties of materials at the same time. to overcome this drawback, a reactive flame retardant, which was incorporated in the main chain of pet, was used and an intercalative polymerization to layered silicates was conducted so as to prepare novel flame - retardant copolyesters / layered silicate nanocomposites
為了克服這一缺點,我們在引入一種反應型含磷阻燃劑的同時,通過插層聚合的方法合成了一種新型的聚合物材料:主鏈含磷阻燃共聚酯層狀硅酸鹽納米復合材料,以期在提高聚合物阻燃性的同時,亦改善材料的其它性能。