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- Effect of amino end group concentration in nylon-6 on the impact toughness of nylon-6/EVA blends 尼龍6中氨基含量對尼龍6/EVA共混物衝擊韌性的影響
- Keywords Poly(butylene terephthalate)(PBT);hydrolysis resistance;carboxylic end group concentration;elongation at break; 聚對苯二甲酸丁二醇酯(PBT);抗水解;端羧基濃度;斷裂伸長率;
- The structure was verified by 1H-NMR,GPC and end group titration techniques. 通過核磁共振氫譜(1H-NMR)、凝膠滲透色譜(GPC)、端羥基滴定等方法;研究了所合成的三嵌段共聚物的結構.
- And the IR analysis shows that silicone resin possesses hydroxyl end group. 紅外光譜(IR)顯示,合成的硅樹脂含有端羥基。
- The polymerization rate is first-order overall with first-order dependence on vinyl functional group concentration and independent of thiol functional group concentration. 聚合反應為一級,且聚合速率與乙烯基濃度有關,而與巰基濃度無關。
- The measurement of carboxyl end group content in PBT was discussed with an automatic potentiometric titrator. 採用全自動電位滴定儀測定PBT切片的端羧基含量,對稱樣量、溶劑的配比、滴定劑的濃度等進行了正交優化。
- The carboxyl end group value control of Du pont's polyeser technology in direct spinning process is studied. 本文從工業生產的實踐出發對杜邦聚酯技術直接紡工藝中端羧基控制進行了研究。
- The reasons for the carboxyl end group fluctuation of bottle grade PET base chips were analysed. 摘要對瓶用基片端羧基波動的原因進行了分析。
- The dendrimers of amino as end group have no visbreaking effect on the crude oil. 端基為氮基的樹狀大分子對原油不具有降黏效果。
- These groups concentrate in the inner cities. 這些人集中在內地城市。
- Mechanical property test, end group analysis and SEM were adopted to study the ageing of PET and PBT composite... 採用拉伸強度與衝擊強度測試、端基分析及掃描電鏡分析等手段探討了PET、PBT複合材料的老化機理和老化性能。
- The results show that the dendrimers of ester as end group have visbreaking effect on the crude oil. 5代樹狀長鏈酯對原油的降黏性能,分析了樹狀大分子的端基結構對原油降黏性能的影響。
- The results showed that the compatibilizer could react with the end group of PET,meanwhile,it was compatible with SEBS very well. 結果表明,增容劑能夠與PET的末端羧基發生反應,並與SEBS有很好的相容性。改性PET的結晶度降低,晶粒尺寸減小,缺口衝擊強度提高。
- The isothermal crystallization curves of PPS and its blends both exhibitdouble peaks because of the different end group structure of PPS. 經等溫結晶處理的試樣,在熔融時相應的PPS也呈現雙峰,其低溫峰隨結晶溫度的提高而向高溫方向移動。
- It is discovered that spectrin,band 3 and band 5 of HS erythrocyte are partly deficient;the membrane thiol groups concentration of HS erythrocyte is lower than normal cells. 在紅細胞膜骨架蛋白中,收縮蛋白、帶3蛋白和帶5蛋白的含量低於正常細胞,膜骨架蛋白的巰基含量低於正常細胞。
- Results indicate interestingly that the double bond of GMA polymerized with polystyryl carbanion and the molar ratio of epoxy end group and polystyrene oligomer can be adjusted. 結果表明:在GMA與聚苯乙烯陰離子反應的過程中,GMA在活性種的終端發生了聚合,所得產物中環氧端基與聚合產物的摩爾比可根據需要進行調節。
- The ethanol used as solvent in polymerization may be introduced intopolymer, forming end group structure, dominantly RCH:CHCH_2CH(OH)CH_3 (cis andtrans). 確定了在聚合過程中乙醇轉移到分子鏈端的主要結構是RCH=CHCH_2CH(OH)CH_3(順式和反式),它占羥基總量8%25左右。
- It wasconcluded that the problem of carboxyl end group amount increase caused by the increase of loads will besolved through advancing the the loads in PET production process. 結論:可以通過工藝過程的負荷前移的方法,解決提高負荷而帶來的端羧基含量升高問題。
- The accident put an untimely end to the party. 意外事故使聚會匆匆結束了。
- The boys were itching for the lesson to end. 那些男孩子們渴望下課。