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【求助】 5句话的英语翻译
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5句话的英语翻译！ 1. On the other hand, the materials based on aliphatic diisocyanates are famous for their unchanged whiteness under ultraviolet, visible light and heat which is often the defect of those based on aromatic diisocyanates. 另一方面，基于脂肪族二异氰酸酯的材料以其独有的白色而著称，且其在紫外光、可见光和热条件下都不会变黄。而这通常是芳香族二异氰酸酯基的缺点。 2.In order to achieve optimal mechanical property, the molar ratio of TDI to total polyesters was set to be 2.1/1 to form some of the allophanate crosslinks as shown following 为了获得最优的力学性能，TDI和总的聚酯的摩尔比定位2.1/1以形成一些脲基甲酸酯的交联点，如下图所示 3. However, it is regretful that Tms were decreased by 9 0C and 18 0C when molar ratios of unit of ε-caprolactone to butylene succinate were 0.08 and 0.18, respectively. 然而，很遗憾的是，当已内酯和丁二酸丁二酯的摩尔比为0.08 和 0.18时，共聚物的熔点下分别降了9 0C 和 18 0C。 4. Meanwhile, Tms were reduced by 5 0C, 10 0C and 21 0C by incorporation of 5 mol%, 10 mol%, and 20 mol% 2-methyl succinic units, respectively. 同时，引入5 mol%, 10 mol%,和20 mol%分别使熔点下降了5 0C, 10 0C and 21 0C。 5. The satisfactory tensile strength of block copolymers may be attributed to the formation of allophanate crosslinks by the introduction of excess TDI. The presence of allophanate crosslinks can be proved by the highest molecular weight of 20 series copolymers, followed by 40 ( in Table 2). This is because polyols with lower molecular weight needs more TDI to chain-extension. As the molar ratio of TDI to polyols was fixed at 2.1/1, relative more excess TDI was applied for 20 based copolymers which would cause more allophanate crosslinks. As a result, highest molecular weight in Table 2 is observed for the 20 based copolymers. The resulted additional chemical tie points by allophanate crosslinks lead to a more uniform stress distribution throughout the sample, thus preventing plastic flow of the crystals and leading to stress-transmission through soft segment. The more uniform stress distribution in combination with increasing chemical crosslinks led to the increasing tensile strength. 嵌段共聚物令人满意的拉伸强度归于过量的TDI所形成的脲基甲酸酯交联键。脲基甲酸酯交联键可以从20系列的共聚物的分子量最高，其次是40系列的分子量而得到证实。这是因为低分子量的二醇需要更多的TDI来扩链。由于TDI与二醇的摩尔比固定为2.1/1, 对20系列来讲，过量的TDI就会多些，这将导致形成更多的脲基甲酸酯交联键。因此，如表2所示，20系列的分子量最高。 此段的最后2句话没有错误，只需改写下，想在保留原意的前提下换种表达方式。 [ Last edited by mengbaiyang on 2008-10-5 at 11:09 ] |
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djxustc
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1. On the other hand, the materials based on aliphatic diisocyanates are famous for their unchanged whiteness and they will not change to yellow when irradiated with ultraviolet, visible light or heated. That color changing is often the defect of materials based on aromatic diisocyanates group. 另一方面，基于脂肪族二异氰酸酯的材料以其独有的白色而著称，且其在紫外光、可见光和热条件下都不会变黄。而这通常是芳香族二异氰酸酯基的缺点。 2.In order to achieving optimal mechanical property, the molar ratio of TDI and total polyesters was set to be 2.1/1 to form some allophanate crosslinks point as shown in table X. 为了获得最优的力学性能，TDI和总的聚酯的摩尔比定位2.1/1以形成一些脲基甲酸酯的交联点，如图X（数字）所示 3. However, the Tms decrease by 9 0C and 18 0C when molar ratios of unit of ε-caprolactone and butylene succinate are 0.08 and 0.18, respectively. 然而，很遗憾的是(删除)，当已内酯和丁二酸丁二酯的摩尔比为0.08 和 0.18时，共聚物的熔点下分别降了9 0C 和 18 0C。 4. Meanwhile, Tms reduce by 5 0C, 10 0C and 21 0C by incorporation of 5 mol%, 10 mol%, and 20 mol% 2-methyl succinic units, respectively. 同时，引入5 mol%, 10 mol%,和20 mol%分别使熔点下降了5 0C, 10 0C and 21 0C。 5. The satisfactory tensile strength of block copolymers may be attributed to the formation of allophanate crosslinking bonds by the introduction of excess TDI. The presence of allophanate crosslinking bonds can be proved by the highest molecular weight of 20 series copolymers, followed by 40 in Table 2. the reason is that diols with lower molecular weight need more TDI to extense the chain. As the molar ratio of TDI to diols was fixed at 2.1/1, relative more excess TDI was applied for 20-series copolymers which would cause more allophanate crosslinks. As a result, highest molecular weight in Table 2 is observed for the 20 based copolymers. The resulted additional chemical tie points by allophanate crosslinks lead to a more uniform stress distribution throughout the sample, thus preventing plastic flow of the crystals and leading to stress-transmission through soft segment. The more uniform stress distribution in combination with increasing chemical crosslinks led to the increasing tensile strength. 嵌段共聚物令人满意的拉伸强度归于过量的TDI所形成的脲基甲酸酯交联键。脲基甲酸酯交联键可以从20系列的共聚物的分子量最高，其次是40系列的分子量而得到证实。这是因为低分子量的二醇（diol not polyols）需要更多的TDI来扩链。由于TDI与二醇的摩尔比固定为2.1/1, 对20系列来讲，过量的TDI就会多些(汉语表达混乱)，这将导致形成更多的脲基甲酸酯交联键。因此，如表2所示，20系列的分子量最高。 |
2楼2008-10-05 00:45:08
djxustc
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3楼2008-10-05 00:46:16
