In the process of reaction, the degradation of the polymer follows a random chain scission mechanism. Every part of the molecular chain has an equal reactive probability.

反應(yīng)過程中PHB 分子鏈各處具有相同的反應(yīng)幾率，分子鏈無規(guī)斷裂黄色片色网站。

This result was consistent with the previous simulation study;(2) the signals of MAH onto the radical chain ends with double bonds increased markedly with increasing MAH content, indicating that P scission occurred after MAH attached to the tertiary carbons.

MAH的用量對接枝PP鏈的等規(guī)度有很大的影響天天狠天天天天透在线二区，主要表現(xiàn)在隨MAH濃度增加，PP鏈的mm序列所占的比例逐漸增大久久福利网，mr和rr序列所占的比例逐漸減小。

We believe that in CO hydrogenation reaction, the scission of C-O bond is via the carbonyl hydride-multihydrogen carbonyl hydride.

與CO加氫反應(yīng)和CO歧化的吸附態(tài)研究結(jié)果相關(guān)聯(lián)www.久久@.Com，作者認為Rh+Co/Al2O3上CO加氫生成CH4是經(jīng)由羰基氫化物-多氫羰基氫化物途徑欧美三级免费A片。

Further annealing at 600K, bond scission in the Si-H moiety results in the desorption of hydrogen and finally leads to the formation of the copper silicide.

我們的理論分析表明，硅原子替代了表面第一層的部分銅原子国内免费久久久久久久久久10，這些硅原子和剩下的銅原子組成一層新的復(fù)合層www.亚洲com.第四页，形成R30°結(jié)構(gòu)。

The modified surface with a high friction coefficient becomes hydrophilic.The main reason is that: there is a basic photoreaction of oxygen under UV radiation,in which atomic oxygen may highly be generated.Then the oxygen atom reacts with trace amounts of water to form hydroxyl.

其機理為：在紫外照射條件下氧氣發(fā)生光化學(xué)反應(yīng)形成氧原子久久久九九九一精品，氧原子和微量的水發(fā)生反應(yīng)形成羥基免费A片男人的天堂久久精品免费，羥基和烴發(fā)生奪氫反應(yīng)形成硅烷的烴自由基，同時硅烷的烴自由基會發(fā)生β-scission裂解形成較短鏈的自由基99视频免费看。

Fig.6.Schematic of the formation of cyclopentanone from the polyester-polyol via primary scission of the ester bond, followed by hydrogen transfer with formation of cyclic chain ends which eliminate cyclopentanone and carbon dioxide

從表2中可以看出一毛不卡毛片免费网址，低溫、氮氣條件下国产三级黄片视频，PU-1分解主要可辨別的組分為1亚洲色婷婷啪啪一区二区，4丁二醇，（Fig.5a）中m/z71不能夠辨別免费看在线a片，（Fig.5b）顯示了m/z71離子譜圖国产精品污视频，這些峰一定是聚合物多元醇熱降解產(chǎn)生的低聚物。

The chain scission occurs at the position with respect to double bonds, forming the main products including dipentene, styrene and vinyicyclohexene.

二聚體形成途徑主要有兩種：（1）主鏈自由基進行分子內(nèi)轉(zhuǎn)移外国黄色网址，&反咬&實現(xiàn)環(huán)化免费在线看黄国产，生成二聚體；（2）單體通過雙分子合成反應(yīng)生成二聚體国产又黄又爽又色又湿。

Excitation functions of neutron, proton and α particle emission prior to scission measured in the reactions 28 Si+ 164,167,170 Er→ 192,195,198 Pb are studied using an extensive fission diffusion model and it is found that the model can well describe the trend of particle multiplicities of Pb isotopes measured experimentally as a function of the bombarding energy,which indicates the existence of isotope effects in prescission particle emission.

用推廣的裂變擴散模型研究了2 8Si+16 4中文字幕求饶的少妇久久福利，16 7，170 Er→192 小草影院亚洲私人影院，195久久免费精品视频，198Pb反應(yīng)中測量的斷前中子、質(zhì)子和α粒子多重性的激發(fā)函數(shù)黄页网站在线大全免费观看。發(fā)現(xiàn)擴散模型能很好地擬合這些輕粒子多重性隨裂變系統(tǒng)激發(fā)能和Pb同位素的變化趨勢wwww麻豆视频。表明斷前粒子發(fā)射存在一個同位素效應(yīng)。進而在一個考慮了裂變過程中摩擦效應(yīng)的統(tǒng)計模型的框架內(nèi)，在In和Er這兩個元素的同位素鏈中久久AV草，考察了同位素效應(yīng)與裂變碎片質(zhì)量不對稱性和裂變系統(tǒng)尺度的關(guān)系www。操逼。com。計算結(jié)果表明：同位素效應(yīng)的存在不依賴于裂變系統(tǒng)的大小和不對稱性。此外国产未成18禁止免费，當裂變系統(tǒng)具有高的中質(zhì)比時色综合日韩欧美，輕帶電粒子發(fā)射將不再敏感于裂變延遲時間的長短，而中子發(fā)射則非常敏感挨操毛片。

The results show that the thermal degradation process of polystyrene initiates from chain end scission, and styrene dimer is the residual of degradation of polystyrene; Different catalysts have different catalytic activity on the degradation process of polystyrene, among which barium oxide is the best.

作者利用熱重質(zhì)譜法對聚苯乙烯熱降解和催化降解過程進行了研究国产色色激情，得出以下結(jié)論，聚苯乙烯的熱降解過程主要由鏈端斷鏈反應(yīng)引發(fā)91AV导航站，苯乙烯二聚體可能是聚苯乙烯降解結(jié)束階段的剩余物永久AV网站；不同催化劑在聚苯乙烯降解過程中具有不同的催化活性，其中氧化鋇的催化活性最高亚洲最大人成在线视频。

Between 4-9L exposures, C2H4 has a desorption channel at 155-180K. C2H4 desorption at 130K maybe results from BrCH2CH2Br absorbs in Br atom toward surfaces, after C-Br bond scission, because C2H4 has no opportunity to touch surfaces so it desorbs at low temperature. C2H4 desorption at 210K is likely to be desorption limited that, BrCH2CH2Br docomposes to C2H4, only to desorb at higher temperature. This C2H4 desorption channel maybe comes from defect site desorption.

曝露量在4-9L之間无码下体流水性视频，C2H4在155至180K的范圍內(nèi)也有脫附的管道。130K的C2H4脫附可能是因為BrCH2CH2Br分子以Br原子朝向表面的方式吸附18禁黄黄污污网站在线看，在斷了C-Br鍵后亚洲已满18岁点击进入久久，C2H4分子沒有機會接觸到表面在低溫就脫附了。210K的C2H4可能是脫附所決定的97久久人妻网站，亦即BrCH2CH2Br分解后在表面形成C2H4伊人网免费视频，隨后溫度升高至較高溫才從表面脫附，此C2H4管道也許是來自缺陷位置上的脫附色色色色色色网站。