pech

网络释义：环氧氯丙烷；岩精；环氧氯丙烷低聚物

网络释义

n.1.a short, fast, and forceful breath

v.1.to pant or struggle for breath from exertion

1.环氧氯丙烷为催化剂，进行环氧氯丙烷阳离子开环聚合，合成端羟基环氧氯丙烷聚醚（PECH）。

7.环氧氯丙烷二醇原料,首先通过阳离子开环聚合合成出中间产物(Ⅰ)聚环氧氯丙烷二醇(PECH),然后用PECH封端TDI,制备出端基为氯醇基团的 …

1.It is discovered through experiment that treating PECHs with different relative molecular mass should use different extraction solvents.实验表明，处理不同相对分子质量的PECH，应采用不同的萃取溶剂。

2.The hydroxy value of hydroxy-terminated polyepichlorohydrin (PECH) is a very important index which influences many properties of PECH.端羟基聚环氧氯丙烷（PECH）的羟值是影响其性质的重要指标。

3.The results demonstrated that PECH-DMA could greatly enhance the removal efficiency of NTU and organic substances.结果表明：助凝效果明显，浊度和有机物的去除效果都得到明显提高。

4.Pech Valley, Afghanistan: As darkness falls a US soldier smokes a cigarette before getting into his armored vehicle for a night patrol佩赫谷，阿富汗：夜幕降临，一个美国士兵在进入装甲车夜巡前吸烟。

5.Experimental Study on Sedimentation Water Quality Improvement in Pech-David Water Plant in Toulouse in France改善法国图卢兹自来水厂沉淀池出水水质的实验研究

6.A Study on the Modification of Cellulosic Fibers with Low Molecular Weight and Moderate Nitrogen Content of PECH-amine低分子量、含氮量适中的聚环氧氯丙烷胺化物对纤维素纤维改性工艺的研究