熔融聚合,melt polycondensation
1)melt polycondensation熔融聚合
1.Study on synthesis of biodegradable material poly(Lactic Acid-co-Alaine) viamelt polycondensation;熔融聚合法合成生物材料聚(乳酸-丙氨酸)
2.Staring from D,Llactic acid, poly(DLlactic acid) (PDLLA) was directly synthesized throughmelt polycondensation.以DL-乳酸为原料,通过熔融聚合法直接合成外消旋聚乳酸(PDLLA)。
3.Though the relative molecular mass of polylactic acids via solution polycondensation is higher than that viamelt polycondensation, the latter is simpler in process, and is suitable to synthesize the extension prepolymer for further advancing relative molecular mass.其中 ,溶液聚合可以比熔融聚合获得相对较高的相对分子质量 ,但熔融聚合法较溶液聚合法的工艺更简单 ,适宜于制备扩链反应的预聚体。
英文短句/例句
1.Synthesis of Poly(lactic acid-co-valine) via Direct Melt Copolycondensation直接熔融聚合法合成聚(乳酸-缬氨酸)
2.Study on direct melt polymerization of poly (lactic acid-co-caprolactone)聚乳酸-己内酯直接熔融聚合工艺的研究
3.The Movement Analyze and Experimental Observation of Bubble Entering the Melt Polymer Field熔融聚合物中气泡的运动分析与实验研究
4.Direct Melt Polycondensation and Characterization of Polylactic acid Modified by Diethanolamine二乙醇胺改性聚乳酸的直接熔融聚合法合成及其表征
5.Influences of Feed Ratio on the Biodegradable Material Polylactic Acid Modified by L-alanine via Direct Melt Copolymerization投料比对丙氨酸直接熔融聚合法改性聚乳酸的影响
6.Direct synthesis of poly(L-lactic acid) by melt polycondensation熔融缩聚法直接合成聚L-乳酸的研究
7.Study on Copolymers of Poly(L-lactic Acid) with Silk Fibroin Prepared Through Melt/solid Polymerization熔融/固相聚合制备聚乳酸与丝素蛋白共聚物
8.Research on Synthesis of Lactic Acid Prepolymer by Melt Polycondensation and Its Chain Extension;熔融法合成乳酸预聚物及其扩链研究
9.Study on Synthesis of Poly Lactic Acid via Melt-solid Polymerization;熔融固相聚合法合成聚乳酸的工艺研究
10.Melting process of polymer under pure vibration force field (Ⅰ) Theoretical model and melting mechanism纯振动场作用下聚合物熔融塑化过程(Ⅰ)理论模型及熔融机理
11.Direct Synthesis of Poly(L-Lactic Acid) by Melt Polycondensation Under Continuous Microwave Irradiation连续微波辐射直接熔融缩聚法合成聚L-乳酸
12.Ultrasonic Fusion Bonding for Polymer Microfluidic Chips聚合物微流控芯片超声波熔融键合技术研究
13.Preparation of Polylactide/Attapulgite Nanocomposites by Melt Polymerization熔融复合法制备聚乳酸/凹凸棒土纳米复合材料
14.Study on the Synthesis of Bisphenol-A Co-Polycarbonate with Reduced Birefringence Through Melt Transesterification Process;熔融酯交换法合成低双折射共聚碳酸酯的研究
15.Preparation and Properties of Melt Processable Acrylonitrile Copolymers without Plasticizer;非增塑可熔融丙烯腈聚合物的制备及研究
16.Study on Property of Reversible Melting of Polymers by Repeat Step-Scan DSCRepeat step-scan DSC对聚合物可逆熔融性能的研究
17.Study on melt grafting reation of MAH with impact copolymerization PP and its blending with PC/ICPPMAH熔融接枝共聚PP对PC/ICPP合金的影响研究
18.Melting and Plasticating Process of Polymer under Pure Vibration Force Field纯振动场作用下聚合物的熔融塑化过程
相关短句/例句
melt polymerization熔融聚合
1.Study on improvement ofmelt polymerization of polylactic acid;聚乳酸的熔融聚合法的改进研究
2.Synthesis and characterization of polyglycollic acid via directmelt polymerization;直接熔融聚合聚乙醇酸的合成与表征
3.Based on the synthetic research, using PTA, 1,3-PDO as raw materials, 300L PTTmelt polymerization with Ti/Sb/Co/P composite catalyst system was carried out.以PTA、1,3-PDO为原料,在小试合成研究的基础上,采用Ti/Sb/Co/P复合催化体系进行了300L釜规模的PTT熔融聚合研究,并研究了PTT产品的物理机械性能。
3)polymer melt熔融聚合物
4)melt postpolymerization熔融后聚合
5)polymer melting聚合物熔融
6)melt condensation polymerization熔融缩合聚合
1.Poly(ethylene glycol oxalate-co-ethylene glycol succinate) was synthesized bymelt condensation polymerization.采用熔融缩合聚合的方法 ,在醇、酸等摩尔比的前提下 ,琥珀酸与草酸的摩尔比为 1/ 2 2 ,催化剂为 0 。
延伸阅读
熔融聚合单体和聚合物均处于熔融状态下的聚合过程。由于不加其他介质，故可归属本体聚合范畴，但熔融聚合一般用于缩聚物生产，如聚酯、酯交换法聚碳酸酯、以及聚酰胺的后阶段聚合等。熔融聚合适宜于在室温下是固体、熔融后才发生聚合反应的单体。熔融聚合的特点之一,是缩聚反应的聚合热一般较低，传热问题不突出,活化能中等或较高，在较高温度下反应可加快速度；缩聚物熔点较高，反应中又有低分子副产物生成，在熔融状态下聚合有利于低分子物排出，提高缩聚物的分子量等。但熔融聚合的温度一般稍高于聚合物的熔点，故应采用逐步升温的办法，以防单体在聚合过程中挥发或分解。熔融聚合的另一特点是，聚合初期，聚合物分子量较低，体系粘度不高，搅拌、混合、传热、传质（低分子副产物排出）等并不困难；聚合后期，熔体粘度可高达几百帕·秒，传递非常困难。为解决这一问题，工业上对不同的单体采用不同的操作方法。例如，聚酯化反应为逐步可逆平衡反应，故涤纶生产系在真空度要求不同的两台釜中熔融聚合,聚合前期在270℃、2～3kPa下进行,最后在280～285℃、13～130Pa的高真空度下操作,以提高分子量。聚酰胺化反应，平衡常数较大，故尼龙66生产的前期为水溶液加压聚合，以防止单体挥发和分解；后期在管式反应器中熔融聚合，在约3kPa的压力下缩聚。参考书目C.E.Schildknecht and I.Skeist,. Polymerization Processes, John Wiley & Sons, New York, 1977.
