Effects of Ethylene Segments on the Crystallization and Tensile Properties of Biaxially Oriented Polypropylene
文献类型：期刊论文
| 作者 | Huang, Miao-ming1; Dong, Xia1; Fu, Dong-sheng1; Huang, Wei-huan2; Wu, Lin-mei2; Huang, Qiang2; Wang, Du-jin1 |
| 刊名 | ACTA POLYMERICA SINICA
 |
| 出版日期 | 2014-04-20 |
| 期号 | 4页码:455-465 |
| ISSN号 | 1000-3304 |
| 关键词 | Bopp Homopolymer And Copolymer Melting And Crystallization Tensile Behavior Deformation Mechanism |
| DOI | 10.3724/SP.J.1105.2014.13315 |
| 英文摘要 | The melting behavior, crystallizing characteristics and tensile properties of biaxially oriented polypropylene (PP homopolymer for BOPP film (h-BOPP) and PP-PE copolymer for BOPP film (c-BOPP)) were investigated by differential scanning calorimetry (DSC), optical microscopy (OM), tensile test and wide angle X-ray diffraction (WAXD). The results showed that compared with h-BOPP, the isotacticity and crystallization rate of c-BOPP were lower, and its half crystallization time was longer at the same crystallization temperature. For h-BOPP and c-BOPP samples without annealing, the elongation at break was higher. However, after annealing at 140 degrees C for 2 h, the elongation at break of both h-BOPP and c-BOPP decreased a lot, as the more perfect crystallites formed. It was believed that crystals of higher perfection had less ability to rearrange themselves under stretching and therefore could not sustain large extensional deformation. Since there are many ethylene segments in the molecular chains that could inhibit the nucleation and crystallization, the crystallization rate of c-BOPP was low, resulting in lower perfect crystallites after annealing. So the elongation at break of c-BOPP was a little more than that of h-BOPP. In addition, the crystalline structure was proven to be partially destroyed under the extensional deformation, and the oriented noncrystalline molecular chains could be easily reorganized into more perfect crystals in the post heating runs. Due to the ethylene segments in the molecular chains of h-BOPP, the oriented noncrystalline molecular chains of h-BOPP could be easier reorganized. This paper explained the mechanism related to the differences between the tensile properties and crystallization behavior of BOPP with different molecular chains. |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000334988100005 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/51589]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Dong, Xia |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, CAS Key Lab Engn Plast, Beijing 100190, Peoples R China 2.Petrochina Petrochem Res Inst, Beijing 100195, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Miao-ming,Dong, Xia,Fu, Dong-sheng,et al. Effects of Ethylene Segments on the Crystallization and Tensile Properties of Biaxially Oriented Polypropylene[J]. ACTA POLYMERICA SINICA,2014(4):455-465. |
| APA | Huang, Miao-ming.,Dong, Xia.,Fu, Dong-sheng.,Huang, Wei-huan.,Wu, Lin-mei.,...&Wang, Du-jin.(2014).Effects of Ethylene Segments on the Crystallization and Tensile Properties of Biaxially Oriented Polypropylene.ACTA POLYMERICA SINICA(4),455-465. |
| MLA | Huang, Miao-ming,et al."Effects of Ethylene Segments on the Crystallization and Tensile Properties of Biaxially Oriented Polypropylene".ACTA POLYMERICA SINICA .4(2014):455-465. |
入库方式： OAI收割
来源：化学研究所
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