| 新型芳香族磺酰胺对尼龙1212的增韧及其机理的探讨 |
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| 引用本文： | 刘强,刘燕,金日光. 新型芳香族磺酰胺对尼龙1212的增韧及其机理的探讨[J]. 北京化工大学学报(自然科学版), 2001, 28(3): 88-90 |
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| 作者姓名： | 刘强 刘燕 金日光 |
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| 作者单位： | 北京化工大学材料科学与工程学院,;北京化工大学材料科学与工程学院,;北京化工大学材料科学与工程学院, |
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| 基金项目： | 国家科技攻关项目;95-532-01-06; |
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| 摘 要： | 考察了芳香族磺酰胺与聚丙烯酰胺(少量)对尼龙1212力学性能的影响。结果表明,加入约10%(质量分数)的复合增韧剂可以使尼龙1212达到脆—韧转变。增韧尼龙1212的冲击强度大幅提高,断裂伸长率也有提高,拉伸强度并未显著降低。尼龙1212的增韧机理是由于增韧剂破坏了尼龙1212分子链间的氢键作用,增加了链段运动的能力,同时,在受到冲击作用时诱发银纹和剪切带,提高了韧性。
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| 关 键 词： | 尼龙1212 银纹 剪切带 芳香族磺酰胺 |
| 收稿时间： | 2001-01-15 |
| 修稿时间： | 2001-01-15 |
Mechanical properties and toughening mechanism of nylon 1212 toughened by new aromatic sulfonamide |
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| LIU Qiang LIU Yan JIN Ri guang. Mechanical properties and toughening mechanism of nylon 1212 toughened by new aromatic sulfonamide[J]. Journal of Beijing University of Chemical Technology, 2001, 28(3): 88-90 |
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| Authors: | LIU Qiang LIU Yan JIN Ri guang |
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| Affiliation: | College of Materials Science and Engineering , Beijing University of Chemical Technology , Beijing 100029 , China |
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| Abstract: | The mechanical properties of nylon 1212 toughened by a toughening system consisting of sulfonamide and a little polyacrylamide were overall investigated. The results showed that addition of about 10% elasticizer was needed to meet the requirement of brittle toughness transition. After toughened, the impact strength of nylon 1212 was increased remarkably, the elongation was also increased, and tensile strength was not decreased too much. After the elasticizer was added, the -NH 2 in the sulfonamide reacted with the -COOH on the nylon 1212 molecular chain to form hydrogen bond, which took the place of hydrogen bond between nylon 1212 molecules. Because nylon 1212 molecule had long -CH 2- chain of itself, so after the hydrogen bond was broken, the softness of the molecule was greatly improved and the toughness of nylon 1212 was increased. In addition, polyacrylamide induced a lot of silver streaks and shear bands, increasing the impact strength of nylon 1212 greatly. |
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| Keywords: | nylon1212 silver streaks shear zones new aromatic sulfonamide |
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