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Solid-state microcellular foaming of PE/PE composite systems, investigation on cellular structure and crystalline morphology This novel research aims to develop, for the first time, microcellular polyethylene fiber-reinforced polyethylene (PE/PE) clay containing nano-composites during a solid-state microcellular foaming process using supercritical nitrogen (scN2) as a foaming agent. Results show that by employing clay nanoparticles in the matrix, expansion ratio of the microcellular processed composites enhance, because of the nucleating effect of nanoparticles. Microcellular nano-homocomposite has an average cell size of 0.5lm. Trans-crystalline layer of composites with a length of about 3lm; remain intact during the foaming process but the bulk matrix crystalline structure alters to a more oriented ‘‘quasi-fibrillar” structure after foaming. Microcell growth in the amorphous interlamellar regions exerts a tension on the neighboring lamellas which cause some orientation on them. The DSC studies show the emerging of new crystalline sectors with a lower melting point which affirms the creation of a less perfect crystalline morphology due to cell wall movements during cell growth step and subsequent stabilization period of the cells.初次看文獻(xiàn),翻譯還不熟,以上文字大家?guī)兔Ψg一下,,謝謝! |
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固體微孔PE / PE發(fā)泡復(fù)合系統(tǒng),對(duì)細(xì)胞結(jié)構(gòu)和結(jié)晶形態(tài)的研究 這部小說(shuō)的研究旨在開(kāi)發(fā),為第一次,微孔聚乙烯纖維增強(qiáng)聚乙烯(PE / PE)含粘土納米復(fù)合材料的固態(tài)微孔發(fā)泡過(guò)程中使用超臨界氮(scn2)作為發(fā)泡劑。結(jié)果表明,在矩陣采用粘土納米微粒的微孔加工的復(fù)合材料,膨脹率提高,由于納米粒子的成核作用。微孔納米homocomposite具有0.5lm平均細(xì)胞大小。用一根長(zhǎng)約3lm復(fù)合材料經(jīng)晶層;在發(fā)泡過(guò)程中保持不變,但大部分基質(zhì)晶體結(jié)構(gòu)改變到一個(gè)更為導(dǎo)向”的'quasi-fibrillar”結(jié)構(gòu)發(fā)泡后。在非晶層間區(qū)域微增長(zhǎng)對(duì)相鄰層造成一定的取向上的張力。的DSC研究表明,新興行業(yè)的結(jié)晶熔點(diǎn)較低,肯定了由于細(xì)胞壁運(yùn)動(dòng)不太完美的結(jié)晶形態(tài)的創(chuàng)造細(xì)胞生長(zhǎng)步驟和隨后的細(xì)胞穩(wěn)定期 |

至尊木蟲(chóng) (職業(yè)作家)
木蟲(chóng)——小螞蟻...

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