| 乙丙嵌段共聚物的X-射线衍射研究 |
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| 引用本文： | 莫志深,王立筱,张宏放,韩平,黄葆同.乙丙嵌段共聚物的X-射线衍射研究[J].高分子学报,1988,0(6):441-446. |
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| 作者姓名： | 莫志深 王立筱 张宏放 韩平 黄葆同 |
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| 作者单位： | 中国科学院长春应用化学研究所 长春
(莫志深，王立筱，张宏放，韩平)，中国科学院长春应用化学研究所 长春(黄葆同) |
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| 摘 要： | 用大角X-射线衍射(WAXD)方法对按嵌段聚合程序合成的聚丙烯(PP)和乙丙共聚物(EPR)的嵌段共聚物PP-EPR和PP-EPR-PP,以及相应的混合物进行对比研究.乙丙共聚物及其共混物均发现在2θ=20°处存在由EPR中PP链段引起的γ-晶型衍射峰.通过诠释X-射线衍射图,计算结晶度,微晶尺寸和晶格参数等表明,用δ-TiCl_3-Et_2AlCl催化剂获得了嵌段共聚物结构.
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| 关 键 词： | 大角X-射线衍射 嵌段共聚物 机械共混物 链转移混合物 |
| 收稿时间： | 1986-08-20 |
AN X-RAY INVESTIGATION OF BLOCK COPOLYMERS OF ETHYLENE AND PROPYLENE |
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| MO Zhi-shen,WANG Li-xiao,ZHANG Hong-fang,HAN Ping,HUANG Bao-tong.AN X-RAY INVESTIGATION OF BLOCK COPOLYMERS OF ETHYLENE AND PROPYLENE[J].Acta Polymerica Sinica,1988,0(6):441-446. |
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| Authors: | MO Zhi-shen WANG Li-xiao ZHANG Hong-fang HAN Ping HUANG Bao-tong |
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| Institution: | Changchun Institute of Applied Chemistry. Academia Sinica; Changchun |
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| Abstract: | WAXD patters of suggested block copolymers of polypropylene and ethylene-propylene copolymer, PP-EPR and PP-EPR-PP, synthesized by sequential polymerization with δ-TiCl3-Et2AlCl were examined and compared with WAXD of mechanical blends and chain-transfer mixtures of PP and EPR of comparable compositions. The peak at 2θ= 20° for both the copolymers and the mixtures was attributed to γ-modification of PP in EPR. Strong variation in the ratio of diffraction intensities I040/I110 of PP in block copolymers and mixtures was explained in terms of crystallite growth in different directions. Analysis of the spectra and calculation of crystallinity, crystallites size and lattice parameters led to the conclusion that block structure existed in the prepared copolymers. |
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| Keywords: | WAXD Block copolymers Mechanical blends Chaintransfer mixtures |
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