偏酯 的英文怎麼說
中文拼音 [piānzhǐ]
偏酯
英文
partial ester-
The catalytic mechanism of expansible graphite in esterification and the causes behind the lower esterification were discussed
推斷了可膨脹石墨在乙酸乙酯合成中的催化作用機理，分析了可膨脹石墨催化乙酸乙酯合成產率偏低的原因。A non - destructive method is used to simultaneously determine the content of various kinds of phthalate plasticizers and adipate plasticizers in poly ( vinyl chloride ) plastics, applying fourier transform infrared spectroscopy - atr technique to obtain ir spectra and partial least square method to analyze the spectra
摘要為了在線監控聚氯乙烯塑料中增塑劑的含量，採用傅立葉變換紅外光譜atr技術進行光譜測定，利用偏最小二乘法對所測的譜圖進行分析，建立了聚氯乙烯塑料多種增塑劑的無損定量測定方法，同時測定了聚氯乙烯塑料中多種鄰苯二甲酸酯類增塑劑和多種己二酸酯類增塑劑。The results indicated : the mechanical properties of pu prepared by added eg in a two - step process in prepolymerization technology were better than that of one - step process, its tg shifted 6 towards high temperatures ; the tan peak of pu material at low temperature disappeared through decompress boiling distilling technology
結果表明，採用預聚體工藝並且分步加入eg所制備的聚氨酯彈性體具有較好的力學性能，玻璃化溫度向高溫方向偏移了6 ；採用減壓共沸蒸餾工藝制備的聚氨酯材料在低溫區的tan峰消失。Polarized optical microscopy and phase - contrast microscopy were used to observe the banded spherulites of poly ( e - caprolactone ) / poly ( vinyl chloride ) ( pcl / pvc ) blends. the ring spacing and regularity of the banded spherulites decreased with the decrease of the crystallizing temperature
本文利用偏光顯微鏡和相差顯微鏡觀察了聚-己內酯聚氯乙烯形成的環帶球晶，環帶間距隨溫度的降低而減小，規整性亦隨之下降。The study found statistical support was the greatest for the presence of four different groups within the sample : these groups included girls with higher blood pressure and waist circumference alues ; girls with higher leels of triglycerides and lower leels of hdl cholesterol ; girls with more desirable alues on all of the metabolic syndrome indicators, and girls with more undesirable alues on all of the indicators
研究發現這些病例中有四類的數據支持最為充分：包括高血壓和大腹圍；甘油三酯偏高和高密度脂蛋白膽固醇偏低；代謝綜合征的所有指征均符合要求；及並非所有指征均符合要求。This article is about the polymer separator full of holes, we research the performance of the separator, including making two kinds separters that produce wth complete different methods : spreading the separator, pvdf as the basic material, dbp as the plasticizing agent, nm sio2 as the inorganic addition and acetone as the solvent, and make separator on the special machine ; dipping in the separator so that intensify the seprater, its dip liquor is as the liqure as the spreading separator, and dip the base material pp / pe / pp into the liquor for more than 2 hours
本文對多孔聚合物電解質隔膜進行了綜合研究。以聚偏氟乙烯（ pvdf ）為基體，鄰苯二甲酸二丁酯（ dbp ）為增塑劑，納米sio2為無機添加劑，丙酮為溶劑，在流延機上塗布得到了聚合物電解質隔膜。以流延法制備隔膜的漿料為處理液，將基體材料pp / pe / pp浸泡在處理液中2h以上，制備出強化電解質隔膜。The synthesis of midbody lactide for the preparation of pla is also catching more attention in this field. the present situation of lactide synthesis is high reaction temperature and low production ratio which lead to its high production cost and hamper its application in the material. the present research hot spot mainly focus on the improvement of reaction technique as well as the selection of catalyst
制備聚乳酸的中間體丙交酯（ lactide ）的合成也越來越受到重視。丙交酯的合成長期以來存在合成溫度高，收率較低的現狀，以至生產成本偏高，不能比較經濟規模化地應用於材料領域。研究的熱點主要包括丙交酯合成工藝條件的改進，催化劑的選擇與優化。The abnormal conditions of polyester vaccum system such as the frequent exchanging of liquid - ring pump in prepolycondensation, the occlusion of scraped condenser and vaccum atmospheric leg, the eg spray flow decreasing of vaccum injection pump, the working performance on the low side of the injection pump itself were analysed
摘要對聚酯真空系統的異常情況如預聚液環泵頻繁切換，刮板冷凝器、真空大氣腿堵塞、真空噴射泵eg噴淋流量降低，噴射泵本體工作性能偏低等進行了分析。分享友人