| 单词 |
polymethylene |
| 释义 |
polymethylene Chem.|pɒlɪˈmɛθɪliːn|
[f. poly- + methylene.]
A compound, group, or polymeric structure which consists of or contains a chain of methylene groups, {b1}(CH2)n{b1}; orig. spec. any of the series of saturated cyclic hydrocarbons of formula (CH2)n. Freq. attrib.
1892Jrnl. Chem. Soc. LXII. 1310 In this paper the author discusses the question of the identity of the naphthenes from Caucasus petroleum and the polymethylenes. Ibid., The naphthenes in general may also include derivatives of other polymethylene rings. 1910N. V. Sidgwick Org. Chem. Nitrogen ii. 21 In the polymethylene derivatives the ring is often affected. 1930Jrnl. Amer. Chem. Soc. LII. 317 Those poly-esters in which the structural units contain polymethylene chains (CH2)x, in which x is greater than 3–5, show great solubility in benzene. 1953R. J. W. Reynolds in R. Hill Fibres from Synthetic Polymers v. 98 Other addition reactions which can give rise to linear polymers are those involving the polymerisation of..diazomethane or diazoalkanes to give polymethylenes or their alkyl substituted products. 1967Margerison & East Introd. Polymer Chem. i. 17 Taking a portion of the polymethylene chain as the simplest case, the configuration..in which the CH2 groups on adjacent carbon atoms are staggered relative to one another is more frequently assumed..than any other. |
英语词典包含277258条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。
相关内容11：
相关热词搜索：polymethylene英英词典英英释义英语词汇意思用法释义英语
单词 polymetre 释义 polymetre Mus.|plmit(r)|Also (U.S.) -meter.[f. poly- + metre n.1]a. Th......
单词 rummage sale 释义 rummage sale = jumble sale (jumble). 英汉双解词典包含38652条英汉......
字词 髂 释义 【医】 ilia; ilio- 汉译英翻译词典收录405719条汉英翻译词条，基本涵盖了全部常......
字词 髁鼻平面 释义 【医】 Bolton-nasion plane; Broadbent-Bolton plane; nasion-postcondylar......
字词 髁间前窝 释义 【医】 area intercondylaris anterior; fossae intercondyloidea anterior ......
字词 髁骨折 释义 【医】 condylar fracture 汉译英翻译词典收录405719条汉英翻译词条，基本涵......