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。
The assessment officer will countercheck the data on the application form, confirm the eligibility of the applicant for an identity card, and scan the applicant s left and right thumbprints again to ensure the captured records are in order
該主任會核實申請人領取身份證的資格,再次
掃描申請人的指紋以確定已存檔的紀錄正確無誤,並收回舊有身份證(如有的話)及發
出一張申請身份證收據予申請人。
They were so thrilled and delighted that they flung away any pretence of being demure young ladies and rushed out of the house.
她們驚喜若狂,因此一
掃少女往常的矜持,沖
出屋子。
In the system, the collimation semiconductor laser - scanned beam scanning two perpendiculars direct of one plane of the measured workpiece at the same time is made. the beams with the dimension information of two perpendiculars direct are processed by the scanning receive system, the high - speed photoelectric transition and electronic data process. two measured results of the diametric directs and ellipse tolerance, etc, parameter, of the turning workpiece on the same plane are obtained by non - contact automatic measurement
在單向激光
掃描檢測技術的基礎之上,提
出了一種雙向激光
掃描檢測系統,其採用激光
掃描檢測技術與特殊光學系統相結合,用準直半導體激光
掃描光束對被測工件徑向某一截面的兩個相互垂直方向同時
掃描,經
掃描接收光學系統、高速光電變換、電子學系統和微機數據處理系統,對將攜帶有垂直方向被測量信息的光束進行處理,實現了回轉體工件同一截面兩個垂直方向的徑向尺寸和橢圓度等參數的非接觸自動測量,解決了同時非接觸測量回轉體零件同一截面兩個徑向尺寸的難題,它具有高速,高精度和非接觸自動測量等特點。
I ' ll put the room cleaning sign on my door knob before i goout in the afternoon
我下午
出去時把房間打
掃標志掛在門把手上。
So, uh, when theywheeled out ted williams at the all - star game -
那麼,呃,特德?威廉姆斯被
掃出明星賽的時候
The sweepings of every country including our own. isn t that true
這是從包括敝國在內的各國
掃出來的垃圾。
From the view point of the foundation of dft ( which includes the testable measure of gate - level circuits, the testable and controllable measure of functional - level, the flow and methodology of dft and so on ), the author introduce some common testing technology such as scan and bist in modern times. especially the boundary scan technology has been widely adopted in the dft of vlsi. with the special controller, the testing vector could be scanned to the corresponding ports of inner cores from the testing input ports, and the response could also be shifted to the testing output ports
本文從可測性設計的基礎理論
出發(包括門級電路的可測性測度、功能級上的可測性和可控性、可測性設計的流程和方法等) ,介紹了現代常用的可測性技術,比如:
掃描技術、內嵌自測試技術等,特別是邊緣
掃描技術已經廣泛地應用到vlsi的可測性設計之中,它通過特定的控制器,從相應的測試輸入埠將測試向量
掃描至芯核所對應的管腳,再將結果從相應的測試輸
出埠
掃出。
Johnny damon stroked a run - scoring double to the gap in left - center and bobby abreu rapped a single to right, scoring another run
大門掃出中左外野方向帶有一分打點的二壘安打,阿布瑞尤敲出右邊方向一壘安打,又拿下另外一分。