二聚的

Effect of ratio of dimethylol propionic acid to polybutylene adipate glycol on Tg and basic properties of films was studied.

考察了二羟甲基丙酸/聚己二酸丁二醇酯二醇比例对Tg以及膜基本性能的影响。

Short for poly, a condensation polymer that is commonly used in soft-drink bottles、fibers、engineering plastics etc.

聚对苯二甲酸乙二醇酯：PET是由乙二醇和对苯二甲酸通过缩聚反应而成的，反应过程中释放出副产物水。

A novel monomer the 1-methyl-4,5-bis(4-chlorobenzoy) cyclometer containing cyclohexene were prepared,so a group of novel polys containing the cyclohexene and phthalazinone moieties was prepared by the nucleophilic displacement reaction of 1-methyl-4,5-bis(4-chlorobenzoyl) cyclohexene and 4,4′-dichlorodiphenyl sulfone and 4-(3,5-dimethyl-4-hydroxyphenyl)-2,3-phthalazin-1-one.

用新型聚合单体1-甲基-4，5-二(4-氯代苯甲酰基)环己烯与4-(4-羟基苯基)-2，3-二氮杂萘-1-酮、4，4′-二氯二苯砜单体经亲核共缩聚反应，成功地合成了含环己烯结构的杂环联苯型聚醚系列聚合物。

A novel monomer the 1-methyl-4,5-bis (4-chlorobenzoy) cyclometer containing cyclohexene were prepared,so a group of novel polys containing the cyclohexene and phthalazinone moieties was prepared by the nucleophilic displacement reaction of 1-methy l-4,5-bis(4-chlorobenzoyl) cyclohexene and 4,4'-dichlorodiphenyl sulfone and 4-(3,5-dimethyl-4-hydroxyphenyl)-2,3-phthalazin-1-one.

用新型聚合单体 1-甲基-4，5-二(4-氯代苯甲酰基)环己烯与 4-(4-羟基苯基)-2 ，3-二氮杂萘-1-酮、4，4′-二氯二苯砜单体经亲核共缩聚反应，成功地合成了含环己烯结构的杂环联苯型聚醚系列聚合物。

The resolution of the two peaks is between 0.83 and 1.11. There is no particular interaction between xylooligosaccharides and Bio-Gel P-2, and the molecular weight is the dominant factor governing the separation in this system. The purity of xylobiose to xylohexaose separated by once time is 86.94%, 82.90%, 88.30%, 64.20% and 77.89 %, respectively. xylooligosaccharides, gel permeation chromatography, polyacrylamide gel, separation

本文以Bio-Gel P-2为层析介质，以FPLC为层析系统对酶解玉米芯制备的低聚木糖进行分离研究，为后期分离低聚木糖单一组分并将其用于生理活性的研究提供了理论依据。1材料与方法1·1试验材料木二糖标准品购于Sigma公司，低聚木糖由南京林业大学生物化工

With trimethyl,4-dodecylbenezyl ammonium chloride and 18-crown-6 as pase-transfer catalysts, the azidation of polyepichlorohydrin in poly and H2O were studied. The reaction discipline and mechanism were discussed. The results show that the system with trimethyl, 4-dodecylbenezyl ammonium chloride as phase transfer catalyst and PEG as medium is a safe and effective approach to glycidyl azide polymer preparation, and azidational ratio of PECH can reach 97% above within 15 h.

研究了氯化十二烷基苄基三甲基铵和18-冠－6为相转移催化剂时端羟基聚环氧氯丙烷在聚环氧乙烷和水为介质中的叠氮化反应，探讨了反应规律和反应机理，结果表明：以PECH为介质，十二烷基苄基三甲基氯化铵(TMDA-1)为相转移催化剂的反应体系，可在15h内使PECH叠氮化转化率达到97%以上，无主链断裂等副反应，是一条较为安全快速的制备叠氮粘合剂的方法。

The project to be built with an annual output of 20,000 tons a polyethylene terephthalate plant. Adopting advanced and mature direct esterification process for the production of raw materials for purified terephthalic acid and 1,3-propanediol.

本项目拟建设一套年产2万吨聚对苯二甲酸丙二醇酯生产装置，采用国内先进成熟的直接酯化法生产工艺，主要原料为精对苯二甲酸和1，3-丙二醇。

Sulfonated poly are prepared by direct polymerization of biphenol A, disodium 4, 4"-difluoro-3, 3"-disulfonate-1, 1-diphenylketone and 2, 6-difluorobezonitrile. The polymers are characterized with ~1H-NMR, FT-IR.

以双酚A，2，6-二氟苯腈和4，4′-二氟-3，3′-二磺酸钠-1，1′-二苯酮采用直接缩合法合成了不同磺化度的磺酸型聚芳醚腈酮，通过FT-IR和~1H-NMR对聚合物进行了表征，证明其结构正确。

Through the analysis of oil or gas accumulation conditions of K_1n_2 in Wuerxun depression, this paper points out that there are the differences in organic matter abundance of source rock, the quality space matching relation between caprock and source rock, the lateral seal of faults and oil or gas migration form of K_1n_2 between the south and north of Wuerxun depression.

分析了乌尔逊凹陷南二段油气成藏条件，结果表明：乌尔逊凹陷南二段南北部在源岩有机质丰度、盖源质量空间匹配关系、断层侧向封闭性和油气运移形式上存在着明显的差异性；乌尔逊凹陷北部南一段源岩有机质丰度、南二段和大一段盖源质量空间匹配关系、南二段断层侧向封闭性和油气运移形式均好于南部，导致乌尔逊凹陷北部南二段油气供给、运聚及保存条件均优于南部。这即是造成乌尔逊凹陷北部南二段油气显示好于南部的根本原因

The ultrathin multilayer film of poly (diallyldimethylammonium chloride) and polyvinylidene fluoride has been prepared by the layer-by-layer static self-assembly method. The PVDF/PDDA multilayer film with the thickness ranging from about 30nm to 150 nm the thickness of each layer is about 9nm.

聚二烯丙基二甲基氯化铵和极化处理后的聚偏氟乙烯复合超薄膜是通过层与层的静电自组装方法制备的，厚度约30～150 nm，每层膜厚度约为9 nm。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。