| β晶相聚丙烯的研究——Ⅲ. 乙丙嵌段共聚物 |
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| 引用本文： | 史观一,曹友虹,黄斌,黄赛棠.β晶相聚丙烯的研究——Ⅲ. 乙丙嵌段共聚物[J].高分子学报,1987,0(5):359-363. |
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| 作者姓名： | 史观一 曹友虹 黄斌 黄赛棠 |
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| 作者单位： | 中国科学院上海有机化学研究所
(史观一，曹友虹，黄斌)，中国科学院上海有机化学研究所(黄赛棠) |
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| 摘 要： | 乙丙嵌段共聚物中的丙烯链段在β晶型成核剂存在下,可在20—140℃结晶成高纯度的β晶型。研究了结晶温度对试样中β晶型的相对含量及试样熔融行为的影响。发现依赖于结晶温度、形成了二类β晶型。在20—100℃淬火形成的β晶型、熔融后会重结晶成稳定的β晶型,在高于100℃结晶则形成稳定的β晶型。研究了β晶型试样的力学性质,发现其屈服强度低于而抗冲强度高于α晶型试样。
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| 关 键 词： | 聚烯烃 嵌段共聚物 结晶 力学性质 差示扫描量热法 |
| 收稿时间： | 1987-04-07 |
STUDIES ON THE BETA-FORM OF ISOTACTIC POLYPROPYLENE III. Ethylene-propylene Block Copolymer |
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| SHI Guan-yi,CAO You-hong,HUANG Bin,HUANG Sai-tang.STUDIES ON THE BETA-FORM OF ISOTACTIC POLYPROPYLENE III. Ethylene-propylene Block Copolymer[J].Acta Polymerica Sinica,1987,0(5):359-363. |
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| Authors: | SHI Guan-yi CAO You-hong HUANG Bin HUANG Sai-tang |
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| Institution: | Shanghai Institute of Organic Chemistry; Acadcmia Sinica |
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| Abstract: | In the presence of beta-nucleating agent propylene blocks in ethylene-propylene block co-polymer can crystallize to beta-crystalline form with high purity. Effect of crystallization temperature on the relative content and structure of the beta-form and melting behavior in the sample were investigated. It was found that two kind of beta forms were obtained, depending on the crystallization temperature. The mechanical behavior of beta-phase sample was also studied and compared with that of alpha form. |
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| Keywords: | Polyolefins Block-copolymer Mechanical Properties Differential Scanning calorimetry Crystallization |
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