isotactic,英語單詞,主要用作形容詞,作形容詞時譯為“[有化] 全同立構的,等規立構的”。
基本介紹
- 外文名:isotactic
- 詞性:形容詞
- 發音:[,aisəu'tæktik]
- 釋義:[有化] 全同立構的,等規立構的

isotactic,英語單詞,主要用作形容詞,作形容詞時譯為“[有化] 全同立構的,等規立構的”。
等規立構 等規立構(Isotactic),又叫全同立構,聚丙烯叔碳原子具有手性特徵,將聚丙烯主鏈拉直成鋸齒形,排在同一平面上或者相鄰手性中心的構型相同,則形成等規立構。
等壓成型 (isotactic molding )是將塑膠顆粒材料裝入一軟袋模具,然後置於高壓流體中,使之成為料坯的成型方法。此法物料受壓均勻,料坯與模具形狀無關。得到的料坯無氣泡,壓縮均勻,成型中無碎片產生。可用於聚四氟乙烯、超高相對分子質量聚乙烯的預成型。簡介 等壓成型又稱液壓成型。按工藝特點可歸於模壓成型...
全同立構規整度是化學化工名詞 全同立構規整度degree of isotactici:y;isotacticity;isotaG-tic index又稱全同立構指數或等規度。全同立構聚合物在聚合物總量中所占的百分數。其測定方法有:溶解度法、熔點法、相對密度法、(碳)核磁共振法、紅外光譜法等。全同立構規整度的數值反映催化劑在聚合反應中的定向能力...
由於連線C*兩端的分子鏈不等長,或端基不同,C*應當是手征性碳原子。但這種手征性碳原子並不顯示旋光性,原因是緊鄰C*的原子差別極小,故稱為“假手性中心”。根據手性C*的構型不同,聚合物分為三種結構 全同立構Isotactic 間同立構Syndiotactic 無規立構Atactic 全同和間同立構聚合物統稱為有規立構聚合物 ...
聚丙烯的一種,分子中的甲基在主鏈的一側。又稱為全同立構聚丙烯。聚丙烯的一種(其他兩種分別為間規聚丙烯SPP和無規聚丙烯APP)。聚丙烯,是由丙烯聚合而製得的一種熱塑性樹脂。按甲基排列位置分為等規聚丙烯(isotactic polypropylene)、無規聚丙烯(atactic polypropylene)和間規聚丙烯(syndiotactic polypropylene)三種...
全同立構聚合物 全同立構聚合物,外文名isotactic polymer,是指由相同構型重複單元所組成的有規立構聚合物,是材料科學技術里的高分子材料。全同立構聚合物
如果所有相鄰構型都相同,不論是R還是S型,就稱該高分子鏈的旋光構型為全同(isotactic)(等規)的。如果所有相鄰構型都相異,即R和S相間出現,就稱該高分子鏈的旋光構型為間同(syndiotactic) (間規)的。如果異同的情況雜亂無章,就稱該高分子鏈是無規(atactic)的。高分子的人工合成尚不能完全控制旋光構型的...
利用Ziegler-Natta觸媒如TiCl3/AlCl3/Al(C2H5)2Cl系統可將4-甲基戊烯聚合成聚(4-甲基戊烯),通常,所得的聚(4-甲基戊烯)具有頭對尾(head-to-tail)結構,且具有同排(isotactic)的立體規則結構。立體規則性使聚(4-甲基戊烯)具有相當高的結晶度。聚(4-甲基戊烯)具有的結晶是由聚合體鏈繞成的螺旋(...
用於製備這種特殊聚合物的單體通常為丙烯、共軛二烯烴、苯乙烯和甲基丙烯酸甲酯,其聚合所得大分子鏈結構單元中含有手性碳原子, 由於手性碳原子上的基團不同排列可得到全同立構(isotactic)、間同立構(syndiotactic)和無規立構(atactic) 3種構型。共軛二烯烴1,4-聚合所得聚合物鏈上含有雙鍵,因此還存在順式和反...
[1]. Yan-Hui Chen, Zhang-Yong Huang, Zhong-Ming Li*, Jian-Hua Tang, Benjamin S. Hsiao.Simultaneous improvement of strength and toughness in fiber reinforced isotactic polypropylene composites by shear flow and β-nucleating agent.RSC Advances. 2014, 4: 14766-14776. (IF: 3.708)[2]. Yan-...
[3] Shu-Gui Yang, Yan-Hui Chen, Bowen Deng, Jun Lei*, Liangbin Li, Zhong-Ming Li*, Window of Pressure and Flow To Produce β-Crystals in Isotactic Polypropylene Mixed with β-Nucleating Agent, Macromolecules , 2017, 50(12): 4807–4816. (SCI影響因子5.914)[4] Shu-Gui Yang, Zhe ...
53. Yijing Qin, Yahu Xu, Liying Zhang, Guoqiang Zheng(通訊作者), Xingru Yan, Kun Dai, Chuntai Liu, Changyu Shen, Zhanhu Guo. Interfacial interaction enhancement by shear-induced β-cylindrite in isotactic polypropylene/glass fiber composites, Polymer, 2016, 100, 111-118 52. Xianhu Liu, ...
isotactic pentad fraction 分數 pentad d 五個一組 pentad five days 古代計時單位 pentad of noncollinear points 非共線點的拼五小組 3-Pentad 十五烷基苯酚 雙語例句 1、The average PCD in Altay region was 0.205; the average PCP was the 38.12 pentad. 阿勒泰全區汛期降水平均集中度為0.205,平均...
isotactic polypropylene 聚丙烯 ; 全同立構聚丙烯 polypropylene capacitor 聚丙烯電容器 polypropylene fibre 聚丙烯纖維 ; 丙綸 ; 翻譯 isotaetic polyPropylene 分為等規聚丙烯 graft polypropylene 接枝聚丙烯 ; 接技聚丙烯 PPO polypropylene 聚丙烯 Polypropylene film 聚丙烯薄膜 ; 聚丙烯膜 ; 聚丙烯 Polypropylene Membrane...
3.Lv Ruihua, Li Zhujun, Na Bing*, Cooperative effect of molecular orientation and beta-form on toughening injection-molded isotactic polypropylene with beta-nucleating agent, Journal of Applied Polymer Science2012,125, 2764-2770.4.Pan Huayan, Na Bing*, Lv Ruihua, Embrittlement of poly (L-...
1.ADJ (of a stereospecific polymer) having alternating stereochemical configurations of the groups on successive carbon atoms in the chain 間同立構的 [chem] → compare isotactic 短語搭配 syndiotactic unit 間同立構單元 ; 翻譯 syndiotactic sturcture 間同結構 syndiotactic polymer[高分子] 間同立構聚合物...
110.Xiong-wei Wang, Jian Dai, Jing-wei Chen, Jin Duan, Jing-hui Yang, Ji-hong Zhang,Yong Wang*. Abnormal tensile creep behavior of annealed β-nucleated isotactic polypropylene.Ind. & Eng. Chem. Res.2015, 54, 4976-4987.109.Chen-xia Feng, Jin Duan, Jing-hui Yang, Ting Huang, Nan ...
6.Effect of the Initial Maleic Anhydride Content on the Grafting of Maleic Anhydride onto Isotactic Polypropylene, Journal of Polymer Science: Part A: Polymer Chemistry, 2005, 43, 5529-5534 (IF=3.5)7.Rheology and morphology of reactively compatibilized PP/PA6 blends,Macromolecules,2002,35,...
3.Yi-wei Luo, Chun-ling Xin, Zhao-ping Yang, Bao-rui Yan, Zhong-peng Li, Xiao-hu Li, Ya-dong He*, Solid-state foaming of isotactic polypropylene and its composites with spherical of fibrous poly(butylenes terephthalate), Journal of Applied polymer science, 2015, 132(15):41801 4. ...
(4) Ji X, Chen J B, Zhong G J, et al. Nonisothermal crystallization of isotactic polypropylene in carbon nanotube networks: The interplay of heterogeneous nucleation and confinement effect[J]. Journal of Thermoplastic Composite Materials, 2014, 100(3):309-15. 0892-7057.(5) Xin Yi , Ling ...
(18)Huo H, Jiang S, An ., Feng J. Influence of shear on crystallization behavior of b-phase in isotactic polypropylene with b-nucleating agent, Macromolecules, 2004, 37(7): 2478-2483.(19)Jiang S, An L, Jiang B, Wolf B A. Temperature and pressure dependence of phase separation of...
1.Lv Ruihua, Li Zhujun, Na Bing, Cooperative effect of molecular orientation and beta-form on toughening injection-molded isotactic polypropylene with beta-nucleating agent, Journal of Applied Polymer Science2012,125, 2764-2770.2.Na Bing, Zou Shufen, Lv Ruihua, Luo Mingbiao, Pan Huayan, Yin...
8.Wang, Lixia; Jiang, Lin; Li, Shuang; Zhang, Yang; Wang, Dongfang; Li, Qian; Shen, Changyu. Influence of scale effect and injection speed on morphology and structure of the microinjection molded isotactic polypropylene parts. Polymers for Advanced Technologies, 2020, 31(7):1463-1473 9. ...
Patrick S. Dai, Peggy Cebe, Malcolm Capel, Rufina Alamo, and Leo Mandelkern. “Small and Wide Angle X-ray Scattering Study of Metallocene Isotactic Poly(propylene).” J. Applied Crystallography, 33-3(1), 714-717 (2000).Patrick S. Dai, Peggy Cebe, Malcolm Capel, Rufina Alamo, and Leo ...
27. W.-X. Zhou, B. Li, T. Liu, G.-P. Cao, L. Zhao, and W.-K. Yuan, Shape complexity and fractality of fracture surfaces of swelled isotactic polypropylene with supercritical carbon dioxide, Physical Review E 73, 011801 (2006).26. W.-X. Zhou and D. Sornette, Is there a real...
(19) Radiation-Induced Inclusion Polymerization of Acrylonitrile in Urea Canals: Toward Synthesis of Completely Isotactic Polyacrylonitrile with Controlled Molecular Weight - Macromolecules - 2013 - 46(5) (2013) 1765-177 (20) Near Room-temperature Magnetoresistance Effect in Double Perovskite La2NiMnO6 ...
