熱聚合體 的英文怎麼說
中文拼音 [rèjùgětǐ]
熱聚合體
英文
thermal polymer-
Newcastle disease virus ( ndv ) strain 695, a thermostable nature avirulent strain, were replicated in embryonated chicken eggsand its rna was extracted from allantoic fluid. referred to the reported sequence of f gene, a pair of primers were designed and synthesized. f gene of ndv b95 strain was amplified by rt - pcr, the pcr products were checked by agrose gel electrophoresis and purified by agrose gel fracion method
利用從國外引進的新城疫熱穩定性天然弱毒b _ ( 95 )株接種spf雞胚繁殖病毒,經處理后提取病毒的基因組rna ,參考國內外發表的ndv融合蛋白基因序列,設計一對特異性引物,經反轉錄聚合酶鏈式反應( rt - pcr )擴增出約1700bp大小的特異性片段,將此片段回收純化后,利用t - a克隆技術將其克隆到pgem - t - easy克隆載體中,再轉化大腸桿菌jm109感受態細胞,轉化后經分子量比較、 pcr鑒定和酶切分析篩選陽性克隆。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。These precursors polymerize to form polyamic acid ( paa ). the paa reacts with metal film such as copper. thus its character become worse and circuit resistance increases
電子科技大學博士學位論文聚酚亞胺( pi )是薄膜多層布線的重要介質材料,它是由兩種單體在熱處理后聚合而成。Comparisons of the resistivity and thermal volume expansion of the ptc composites revealed that the thermal volume expansion is one of the leading factors for the polymeric ptc transition. the more the thermal volume expansion is, the stronger the ptc effect shows
研究結果表明,無論結晶還是非晶聚合物體系,體積膨脹都是引起復合材料ptc效應的重要原因,聚合物基體的熱膨脹程度越大, ptc效應也越明顯。Some amino acids and drugs imprinted spheres ( mipm ) were prepared via seeds swelling and suspension polymerization, suspension polymerization and emulsion polymerization. the physical and chemical properties of the polymers were analyzed by scanning electron microscope, thermogravimetric analyzer, electron spectrum and solid phase extraction ( microextraction ) technology. the imprinting and recognizing principle of mipm in water was studied through bi - templates imprinting method as well
分別採用種子溶脹懸浮聚合法、懸浮聚合法和乳液聚合法,在水相中體系制備得到了一系列氨基酸和藥物印跡的分子印跡聚合物微球( mipm ) ;採用掃描電鏡、熱失重分析、電子能譜分析、固相(微)萃取等技術對制備所得的mipm進行了分析和表徵;採用雙模板印跡的方法對水相中mipm的印跡和識別機理進行了探討。Through the research of crosslinking of matrix resin, heating treatment of composite and mixing of different polymer, we draw some conclusions : 1 、 percolation theory can explain the phenomenon of the jump of resistance when the content of cb reach a critical volume ; 2 、 based on ohm conduct theory, abounded to the percolation the wbibull statistical theory and other theory, an adapted theory was obtained to explain the jump of resistance and the other phenomenon ; 3 、 the ntc phenomenon was eliminated by crosslinking the matrix of conductive composite, at the same time the stability of composite was improved
通過對基體樹脂的交聯、復合材料的熱處理、聚合物共混物的研究得出了如下的結論: 1 、滲濾理論能夠很好的解釋導電粒子含量達到某一值時電導率劇增的問題; 2 、在歐姆導電模型的基礎上,綜合應用了weibull統計理論模型,結合原來的體積膨脹等理論,成功的解釋了ptc復合材料在基體材料熔點附近的跳變問題、 ntc現象以及熱循環穩定性等問題; 3 、有機ptc導電復合材料經硅烷交聯以後能夠消除ntc現象,改善了導電復合材料的穩定性能。Firstly, a situ - polymerization method as the preparation process of gplb is introduced and pmma as the polymer matrix of the gel electrolyte is selected. the thermal polymerization process of the gel electrolyte is also optimized
首先,採用了現場聚合法制備凝膠聚合物鋰離子電池的工藝,根據該制備工藝選擇pmma基作為該凝膠聚合物電解質的聚合物體系,然後對凝膠的熱聚合工藝進行了優化,確定了最佳的熱聚合工藝。( 2 ) it is found that distilled water as lubricant can markedly reduce the accumulation of friction heat and temperature rise on the frictional surfaces of polymer. so the heat fatigue and adhesive wear decrease. moreover, a lubricating film forms on the interface between the counterpart and polymer when distilled water acts as polar lubricant
( 2 )潤滑劑水的存在,可大幅度降低聚合物磨損表面的摩擦熱積累及溫升,從而減少了基體的熱疲勞磨損和粘著磨損,同時,水作為一種極性潤滑劑,在摩擦界面上能形成一層潤滑膜,對摩擦表面起了一定的隔離作用。For conductive fillers / piezoelectric ceramic / polymer composites, based on the piezoelectric and conductive theories, mechanical energy or sound energy can change into electric energy induced by piezoelectric ceramic ' s piezoelectric effect, and then these energy can be dissipated in form of heat energy through conductive network formed by conductive fillers in the system
在導電填料/壓電陶瓷/聚合物復合材料體系中,根據壓電、導電原理,機械振動能(或聲能)可通過壓電陶瓷的壓電效應轉換為電能,並通過體系中導電填料形成的導電網路,將電能以熱的形式耗散,從而達到減振降噪的效果。Standard test method for linear shrinkage and coefficient of thermal expansion of chemical - resistant mortars, grouts, monolithic surfacings, and polymer concretes
耐化學腐蝕的灰漿薄漿整體面層和聚合物混凝土的熱膨脹系數和線收縮性的標準試驗方法A dilution of the cb volume fraction due to the thermal volumen expansion of the composites is estimated. if the cb volume fraction decrease to the percolation threshold, ptc effect of the composites occur
隨著聚合物基體的熱膨脹,無論是結晶聚合物基體或非晶聚合物基體體系,只要導電填料的體積分數被稀釋到臨界體積分數以下,復合材料就會產生ptc效應。Thermoplastic phenol - formaldehyde resin bond synthesized by solution po1ymeization is commonly used in making diamond grinding wheel, which has disadvantages such as : absorbing moisture, difficult mixing, can not being long term store, needing curing agent, and giving off dangerous gas
目前,金剛石樹脂砂輪普遍採用溶液聚合熱塑性酚醛樹脂作結合劑,此結合劑存在著易吸潮結團、混料困難、不易長期存放,需加固化劑才能固化,且固化過程中有大量的有害氣體溢出,使用時需要加工成粉末等缺點。Lactide were investigated. the key factors affecting the polymer intrinsic viscosity were found to be monomer recrystallization times, stannous octoate concentration and polymerization time. the thermal stabilizing agent did not significantly affect the polymer molecular weight. the polymer with a viscosity average molecular weight beyond 200000 was fairly reproducible by optimizing the polymerization conditions. it was found that poly
單體重結晶次數辛酸亞錫濃度聚合時間等條件均是影響聚合物特性粘數的重要因素。熱穩定劑對聚丙交酯的分子量幾乎沒有影響。優化聚合條件可以獲得粘均分子量大於200000的聚丙交酯材料,聚合結果具有良好的重復性。The tlow distance and gelating time of the nanocomposites were shorter than that of the pure pf, which meet the standard of the pf used in frictional materials. compared to the pure pf, the silica7pf nanocomposites exhibited excellent heat stability only in nitrogen atmosphere, however, so do vermiculite / pf nanocomposites in both nitrogen and air atmospheres. compared to the brake pad based pf resin, the wear rate of the present one based with silica / pf nanocomposite decreased obviously, especially in high temperature
用烷基銨ctab和kh - 560對蛭石進行有機化處理,通過原位聚合法制備了酚醛樹脂接枝改性sio _ 2納米復合材料、酚醛樹脂kh - 560改性sio _ 2納米復合材料、酚醛樹脂ctab改性蛭石納米復合材料、酚醛樹脂/ kh . 560改性蛭石納米復合材料,採用ftir 、 xrd 、 afm和tg分析與流動距離、凝膠化時間的測試,研究了所制備的酚醛樹酯納米復合材料的結構、固化行為和熱穩定性能,並研究了以酚醛樹酯納米復合材料為基體的剎車片摩擦磨損性能。With 5 % - 15 % ( by mass fraction ) ethyl - benzene as diluent, styrene - acrylonitrile random copolymer was synthesized by means of the continuous bulk polymerization of styrene and acrylonitrile initiated by heating
摘要以苯乙烯、丙烯腈在添加質量分數為5 % ~ 15 %的乙苯作稀釋劑的條件下,進行熱引發連續本體聚合,合成了無規苯乙烯丙烯腈共聚物。Abstract : water solution polymerization and precipitation polymerization of ethenyl radical monomers were carried out at same conditions, and the differences between the products in molecular weight and other aspects were investigated
文摘:針對目前溶液聚合體系中、後期粘度高,熱擴散不利,從而影響分子量提高的問題,進行乙烯基類單體在同等條件的水溶液聚合及沉澱聚合,比較了獲得的聚合物產物在分子量及應用性質上的差異。Aim : to analyze the mechanism, thermadynamic theoretical basis, dynamic mechanism and influencing factors of thermally induced phase separation ( tips ) in order to completely grasp the factors affecting the size, distribution and form of pores, so that the adjusted range of pore can be widened and the preparation of porous membrane can be repeated and controlled. methods : considering from the structural characteristics of tissue engineered materials, the methods of preparing porous membrane using tips technique, the hermadynamic theoretical basis, dynamic mechanism and influencing factors were analyzed, the problems and investigative directions in the future were also analyzed. tips technique is a process of phase separation of polymer homogenous solution under quenching, and it is suitable for diameter and structural form of the micropore materials prepared using tips are closely correlated with the kind and dispensing proportion of polymer attrnuant, polymer concentration and polymer molecular mass, etc. conducted, including determination of polymer - solvent system phase diagram, study of form and appearance of porous membrane of different thickness, study of form and appearance of porous membrane prepared with systems of different x, which is the parameter of polymer - solvent interaction
目的:分析熱致相分離成膜過程的機理、熱力學理論基礎、動力學機制以及影響因素,以便充分掌握影響孔度大小、分佈、形態的因素,使孔度調控范圍得以拓寬,使多孔膜的制備能重復可控.方法:從組織工程材料結構特點出發,分析熱致相分離聚合物多孔膜的制備方法及該法成膜的熱力學理論基礎、動力學機制以及影響因素.並分析實驗中存在的問題及今後的研究方向.結果:以熱致相分離法可制備聚合物多孔膜.熱致相分離法制備多孔膜是高聚物均相溶液在淬冷條件下發生相分離的過程,它適用於上臨界共溶溫度型聚合物一稀釋劑二元體系.熱致相分離法成膜的過程,可以認為是旋節線機理佔主導地位.熱致相分離法制備的微孔材料,其孔隙率、孔徑大小、結構形態與聚合物稀釋劑的種類、組成配比、聚合物濃度、聚合物分子量等因素密切相關.結論:可採用熱致相分離技術制備多孔膜,通過改變不同的成膜條件可獲得一系列不同孔徑尺寸和孔徑分佈的多孔膜材料.對熱致相分離成膜過程中聚合物-溶劑體系的相圖測定,不同厚度的多孔膜形貌研究,不同x (聚合物-溶劑相互作用參數)體系所制備的多孔膜形貌等需深人研究Micellization of block copolymers in selective solvents was reviewed with 69 references. the structure, kinetics, dynamics and hydronamics behavior of the formation of block copolymer micelles were discussed
綜述了近20年來在選擇性溶劑中嵌段聚合物締合行為的研究進展,探討了膠束結構、表徵方法及膠束形成的熱力學、動力學和流體力學。About thermal setting polymers
關于熱量配置的聚合體的事情Making analogy with the " " spin - glass " phase in polymers, peschanski put forward the idea that there exists non - thermal phase transition in multiparticle systems. a parameter xq has been introduced to characterize the non - thermal phase transition
通過類比聚合體中的「自旋玻璃相」 , peschanski提出隨機級聯的多粒子產生過程中存在非熱相變,並提出表徵相變的特徵參數_ q的公式。分享友人