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同時(shí),含100%BO的均聚物A薄膜的斷裂伸長(zhǎng)率(30.04%)要比含100%BI的均聚物E的斷裂伸長(zhǎng)率(9.61%)高得多,這歸因于含BI的均聚E體系中含有大量的氫鍵相互作用,強(qiáng)的氫鍵相互作用限制分子鏈的運(yùn)動(dòng),從而使薄膜不能實(shí)現(xiàn)高彈形變而發(fā)生脆性斷裂導(dǎo)致較小的斷裂伸長(zhǎng)率。但是,值得注意的是,隨著共聚物中BO含量的變化,它們共聚物的斷裂伸長(zhǎng)率卻并不單調(diào)地變化,當(dāng)BO的含量減小為60%時(shí),共聚物達(dá)到最大的斷裂伸長(zhǎng)率(47.49%),這是因?yàn)橐肷倭緽I鏈節(jié)能極大地破壞分子鏈的規(guī)整排列與堆砌,增加自由體積,使分子鏈運(yùn)動(dòng)加快,從而提高薄膜的斷裂伸長(zhǎng)率。而當(dāng)BO鏈節(jié)含量繼續(xù)減小時(shí),體系中相對(duì)較多含量的BIA將使得氫鍵對(duì)薄膜的斷裂伸長(zhǎng)率影響占到主導(dǎo)地位,因而薄膜的斷裂伸長(zhǎng)率下降,直至BI的含量達(dá)到100%,其斷裂伸長(zhǎng)率降到最低(9.61%)。 [ Last edited by zyblhyzyx on 2011-12-15 at 01:24 ] |

榮譽(yù)版主 (知名作家)
笑熬漿糊——滿腦漿糊
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At the same time, the elongation at break of homopolymer A film containing 100% BO is 30.04%, which is much higher than that of homopolymer E containing 100% BI with a elongation at break of 9.61%. It is attributed to the great hydrogen bonding interactions within homopolymer E system containing BI, by which the movement of molecular chains is limited, so that the film can not achieve high-elastic deformation and brittle fracture resulting in a small elongation at break. However, it is worthy to note that with the content of BO changes in the copolymer, and its elongation rate won’t changes monotonously. In fact, when the BO's content was reduced to 60%, a maximum breaking elongation rate was achieved at 47.49%. It might be caused by the introduction of a small amount of BI chain which could greatly undermine the regular arrangement and piling up for molecular chains, increase the free volume and speed up the movement of molecular chains, the film elongation at break thereby enhanced. When the BO chain content continues to decrease, relative large content of the BIA in this system will make the effects of hydrogen bonding on the elongation to break of the film to be a dominant position, and thus the elongation at break of the film decreased, and when the content of BI arrived at 100 %, the minimum elongation at break was obtained as 9.61%. 我的個(gè)去,很拗口的。不知道翻譯咋樣了,將就一下。 ![]() |

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