接枝度 的英文怎麼說
中文拼音 [jiēzhīdù]
接枝度
英文
extent of grafting-
Differential thermal analysis ( dsc ) indicates that acid - anhydride reacts with amidogen in nylon 11 to form chemical bond and boost up bonding strength of interface
Dsc分析表明,接枝物中的酸酐基團與尼龍11中的氨基發生反應,形成化學鍵,使得界面粘接力增強,從而使沖擊強度得到提高。As to the high - density polyethylene, two strategies were performed : ( 1 ) after being modified by grafting polar groups on its backbone, polyethylene and organic montmorillonite were melt mixed directly, which could obtain the polyethylene / montmorillonite nanocomposites. the effect of groups grafted on the backbone on the efficiency of intercalation was investigated in this paper ; ( 2 ) choosing the grafters obtained in this experiment as the compatilizers, polyethylene / montmorillonite nanocomposites had also been prepared by melt mixing the polyethylene, grafter and organic montmorillonite. the difference of grafters and sequence of mixing on the intercalation result had also been analyzed
對于高密度聚乙烯,採用以下兩種思路進行: ( 1 )對聚乙烯首先進行功能化改性,使聚乙烯分子鏈上接枝上不同的極性基團,將改性后的聚乙烯再同有機蒙脫土直接熔融復合,成功的制備了聚乙烯蒙脫土納米復合材料,並考察了接枝到聚乙烯主鏈上基團的不同對最終插層效果的影響; ( 2 )選用制得的接枝物作為相容劑,將聚乙烯,接枝物,有機蒙脫土三者熔融復合,也可以得到聚乙烯蒙脫土納米復合材料,並對選用不同的接枝物作為相容劑以及復合順序對最終插層效果的影響加以分析。Abstract : the property of silk fabric grafted ( cross - linked ) with hydroxypropyl methacrylate and protein at different rate of weigh gain, by measuring strength and elongation at break, dyeability, elastic, moisturecontent, whiteness, permeability of gas, ir and x - ray diffraction diagrams was studied
文摘:通過對織物的拉伸特性、吸濕性、彈性、染色性、白度、透氣性、紅外和x射線衍射的研究,探討了在不同增重率條件下甲基丙烯酸羥丙酯在絲蛋白存在下與真絲綢接枝交聯后的結構及其特性的影響。With increasing the content of ydh151, the grafting degree increased and the grafting efficiency decreased. however, the content of dcp cannot be added too much so as to avoid the crosslinking reaction between ydh151 and hdpe
但是由於ydh151與hdpe也會發生交聯,所以dcp的量不能過多, ydh151的量也在低於10 %為宜, ydh151含量太多時接枝效率大幅度一卜降。Preparation, structure and properties of hdpe ~ g ~ aa / mmt nanocomposites melt grafting reaction of hdpe with aa was performed in thermohaake rheomix and hdpe - g - aa with high grafting degree and high grafting efficiency was prepared. the change of torque indicated that the graft copolymerization was existed during melt compounding. the extent of grafting was analyzed by ftir and element analysis
在hdpe中只加過氧化二異丙苯( dcp )時,由於發生交聯反應而使平衡扭矩明顯增加,熔點和結晶度降低,加入aa后, aa與hdpe的接枝和hdpe自身的交聯並存,前者對後者有抑制作用,從而使扭矩下降,熔點和結晶度部分恢復。Study on particle size distribution of polypropylene and grafting rate during pan - milling
磨盤碾磨聚丙烯粒度分佈與接枝率的研究Results of study show that inception voltage of electrical tree, breakdown voltage, environmental stress cracking, tensile strength and elongation at break of low density polyethylene are improved after grafting
研究結果表明:接枝聚硅氧烷后,改性的低密度聚乙烯的樹枝引發示性電壓、擊穿場強、耐環境應力開裂性、拉伸強度及斷裂伸長率都得到提高。According to the observed experiments that the na2feo4 solution with the same concentration and volume were decomposed by the same area of different membrane, we learned the order of the decomposing rate of na2feo4 caused by different membranes : soapnated cellulose acetate > vinylon > polypropylene polyvinyl chloride = polyethylene microfiber glass mat
從觀察等面積的隔膜引起同濃度同體積的na _ 2feo _ 4溶液的分解實驗可知,不同隔膜材料引起na _ 2feo _ 4溶液分解速率從大到小的順序是,皂化再生纖維素膜維尼綸無紡布改性聚丙烯膜聚氯乙烯膜輻射接枝聚乙烯膜復合玻璃纖維氈。This article confirmed the grafting efficiency of starch grafted to acrylic acid and the structure of starch and its grafted matter through the separation, purification and analysis tests to the grafted copolymer and the grafted forked - chain matter produced from the process of this reaction ; and deduced the formula of the velocity of such reaction mentioned above with a calculated result of the apparent activation energy in this reaction by the curve showing the relationship among the consistency of starch, monomer and initiator and the velocity of the grafting copolymerization
摘要對澱粉接枝丙烯酸所得接枝共聚物及接枝側鏈物進行分離提純和分析測試,確定了其接枝效率並表徵了澱粉及其接枝物的形態結構;通過分別測定接枝共聚反應速率與澱粉、單體、引發劑濃度的關系曲線,確定了該接枝共聚反應的速率關系式;推算出了反應的表觀活化能。The influence of tmpp on the dynamic rheological behavior of the nanocomposite and the relationship between the rheological behavior and temperature were also investigated
用透射電鏡表徵了納米復合材料的結構,研究了接枝物對納米復合材料動態流變行為的影響,以及流變行為與溫度的關系。Morphological structure analysis indicates that the addition of pe - mah induces surface tension, makes phases uniformity, enhances bonding strength of interface and improves compatible property
Sem分析表明,接枝物的加入,降低了界面間的表面張力,使兩相分散均勻,分散度提高,增強了相間的粘接力,改善了尼龍11與聚乙烯的相容性。When aa content was less than 10wt - %, the extent of grafting increased with increasing the content of aa, and the grafting efficiency maintained in a high level of about 80 %
在aa含量低於10時,接枝效率可以保持在80以上; aa含量太多時易產生自聚,使接枝效率大幅度下降。Polyvinylalcohol ; n - isopropylacrylamide ; thermo - response hydrogel ; radiation grafting ; controlled release
Pva nipaam ;溫度敏感性輻射接枝控制釋放It was found that the mmt was exfoliated and intercalated in san resin. the mechanical properties of the san / mmt composite were improved
把san mmt作為母料與高膠含量的abs接枝粉料混合,發現復合材料abs mmt的抗沖,拉伸強度均有所提高。The content of styrene was found to be dependent on the investigated grafting conditions, of which the dose rate and monomer concentration were the major conditions, and the dependence of the initial rate of grafting on the dose rate and the monomer concentration was found to be of 0. 4286 and 1. 1662 orders, respectively. the results indicate that the grafting reaction is competitive and the copolymerization and the graft - copolymerization are existing at the same time. the grafting proceeds by the so - called front mechanism in which the grafting starts at the surface of the films and moves toward the middle of the film by successive diffusion of the styrene through the grafted layers
我們對輻射接枝反應中的各個因素如:單體濃度、輻射劑量率、輻射劑量以及反應時間進行了研究分析,結果表明:單體濃度和劑量率是反應的兩個主要影響因素,它們對反應速率的影響指數分別為1 . 1662和0 . 4269 ;反應的動力學方程為: rg k [ d ] ~ ( 0 . 4269 ) [ m ] ~ ( 1 . 1662 ) ;認為接枝反應是一競爭反應,單體的均聚反應和在聚合物上的接枝反應同時存在,單體濃度的高低決定著競爭反應的方向;輻射接枝反應是從聚合物表面開始的,隨著溶劑的溶脹和單體的擴散最後在整個膜體中形成接枝產物。In the system the effects of photoinitiator and monomer concentration on grafting are not distinct, while photo - reduction time, uv irradiated polymerization time and uv light intensity have more effects on grafting yield
實驗發現,光敏劑濃度對接枝率有一定影響;光還原時間增加,接枝率明顯增加;聚合前期接枝率提高較快,反應後期增加緩慢;紫外光照射強度的改變會影響接枝率。When the graft ratio was high, the hydrophilic side chain was long and the molecular mass of the main chain of the hydrophilic matrix was great, the diffusion of pp - g - peg in pp blends would be poor, and the diffusion coefficient would also be small
接枝率越高、親水性側鏈的長度越長,親基體主鏈摩爾質量越大,接枝共聚物在聚丙烯共混體系中的遷移擴散性能越差,擴散系數越小。Synthesis and characterization of graft acrylamide onto different degree of deacetylation value of chitosan
不同脫乙酰度殼聚糖接枝丙烯酰胺的合成與表徵These changes may be attributed to the competition between the grafting of ydh151 and hdpe and the self - crosslinking of hdpe, and the grafting resisted the crosslinking reaction. furthermore the addition of liquid ydh151 decreased the maximal torque
加入ydh151后, ydh151與hdpe的接枝、交聯和hdpe自身的交聯並存,接枝對交聯有抑制作用,從而使扭矩下降,熔點和結品度部分恢復。This topic focused on the radiation effect on the uhmwpe fiber with electron beam ( eb ) radiation. and instron, sem, atr - ir, xps, epr, xrd et al were used to characterize the structure and properties of uhmwpe fiber before and after radiation treatmentand on this condition we probed into the grafting modification with eb radiation technology
本課題研究uhmwpe纖維的電子束輻照效應,運用電子強力機、掃描電鏡( sem ) 、全反射紅外( atr ? ir )光譜、 x射線光電子能譜( xps ) 、電子順磁共振儀( epr ) 、 x射線衍射儀( xrd ) 、接觸角和交聯度測定等方法對uhmwpe纖維在電子束輻照作用下的主要結構與性能變化規律進行了表徵和分析,在此基礎上對運用電子束輻照技術進行uhmwpe纖維的表面接枝改性進行了探討。分享友人