| LLDPE的紫外辐照改性及增韧PA66 |
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| 引用本文： | 冉千平,华鸿艳,吴石山,沈健. LLDPE的紫外辐照改性及增韧PA66[J]. 复合材料学报, 2006, 23(2): 42-46 |
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| 作者姓名： | 冉千平 华鸿艳 吴石山 沈健 |
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| 作者单位： | 南京大学,化学化工学院,南京,210093;南京大学,化学化工学院,南京,210093;南京师范大学,化学和环境科学学院,南京,210097 |
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| 基金项目： | 江苏高校高新技术项目资助（JH02-071）;南京大学大型仪器开放测试基金项目资助. |
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| 摘 要： | 通过紫外辐照在线性低密度聚乙烯(LLDPE) 的分子链上引入C=O、C —O 和—OH 含氧基团, 其含量随辐照时间延长而增加。紫外辐照后, LLDPE 的晶型和晶面间距未发生变化, 但是其熔融温度和结晶度下降。与LLDPE/ 尼龙66 (PA66) 复合材料相比, 辐照LLDPE/ PA66 复合材料的分散性和相容性得到显著改善, 两相之间的界面粘结力明显提高。随辐照时间延长, 辐照LLDPE/ PA66 复合材料的拉伸强度、弯曲强度和缺口冲击强度提高, 在辐照24 h 时达到最高值, 分别比LLDPE/ PA66 复合材料提高了20 %、13 %和330 % , 辐照LLDPE 表现出较好的增韧作用。
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| 关 键 词： | LLDPE 紫外辐照 改性 增韧PA66 |
| 文章编号： | 1000-3851（2006）02-0042-05 |
| 收稿时间： | 2005-04-28 |
| 修稿时间： | 2005-04-282005-08-09 |
LLDPE modif ied by ultraviolet irradiation and toughening of PA66 |
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| RAN Qianping,HUA Hongyan,WU Shishan,SHEN Jian. LLDPE modif ied by ultraviolet irradiation and toughening of PA66[J]. Acta Materiae Compositae Sinica, 2006, 23(2): 42-46 |
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| Authors: | RAN Qianping HUA Hongyan WU Shishan SHEN Jian |
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| Affiliation: | 1.College of Chemist ry and Chemical Engineering| Nanjing University| Nanjing 210093| China ;2.College of Chemist ry and Environment Science| Nanjing Normal University| Nanjing 210097| China |
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| Abstract: | Some oxygen containing groups such as C —O , C=O and —OH were int roduced onto the molecularchains of linear low-density polyethylene (LLDPE) through ult raviolet irradiation in air without other additives andchemical pollution. These groups content s increase with the ult raviolet irradiation time. Af ter the ult raviolet irradiation , the crystal shape and distance of the crystal plane of LLDPE remain unchanged. However , the melting temperature and crystallinity decrease. Compared with those of LLDPE/ nylon66 (PA66) composites , the dispersion ofirradiated LLDPE in irradiated LLDPE/ PA66 composites and the compatibility between irradiated LLDPE and PA66and interfacial interaction are improved obviously. The mechanical properties of irradiated LLDPE/ PA66 compositesinitially increase and then decrease with increasing the irradiation time. Their maximums are obtained when the irradiation time was 24 h. The tensile st rength , bending st rength and notched impact st rength of irradiated LLDPE for24 h/ PA66 composites increase by about 20 % , 13 % and 330 % compared with those of LLDPE/ PA66 composites ;the irradiated LLDPE shows higher toughening effect . |
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| Keywords: | LLDPE ultraviolet irradiation modification toughening of PA66 |
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