Research on the Soft-Sensing and Predictive Control of Vinyl Acetate Polymerization Rate 醋酸乙烯聚合率软测量与预测控制方法研究
Kinetic Study of Vinyl Acetate Graft Polymerization on PEG 聚乙二醇接枝聚醋酸乙烯酯的聚合动力学研究
Studies on vinyl polymerization initiated with ceric ion and ethyl acetylacetate system 铈离子与乙酰乙酸乙酯体系引发烯类聚合的研究
Since the changes in both the mass of the reactants in the reactor and its specific heat are considered, the model can be used to exactly describe the dynamic characteristic of vinyl chloride suspension polymerization. 由于考虑了反应过程中反应物质量及其比热的变化,所建的模型能准确地描述氯乙烯悬浮聚合过程的动态特性。
Manganese ( HI) acetate can be used as an initiator for vinyl radical polymerization. 2) Individual onion like fullerenes. 锰(Ⅲ)离子可以引发烯类单体自由基聚合。(2)单体NOLFs。
Recent Progress in the Initiators of the Vinyl Cationic Polymerization 乙烯基阳离子聚合引发剂的新进展
Studies on vinyl polymerization with initiation system containing amine derivatives 含胺引发体系烯类聚合的研究
This article primarily summarizes recent progress in the research on the preparation of block copolymers by combination of controlled radical polymerizations and ionic ring-opening polymerization, anionic polymerization, cationic vinyl polymerization and other living polymerizations. 本文着重介绍可控自由基聚合与离子开环聚合、阴离子聚合、烯类单体的阳离子聚合及其它活性聚合方法结合制备嵌段共聚物的研究现状和进展。
Abstract Because of the inhibition effect of oxygen on the vinyl polymerization used in the dental restorative resin, a uncured layer may be formed on the surface of composite resin when it is cured in the air. 复合树脂在空气中聚合时受氧气的阻聚影响,在表层形成不固化层,尤其是低粘度树脂受影响更严重,并严重影响复合树脂与牙釉质的粘接强度。
Kinetic Model of Vinyl Chloride Suspension Polymerization with Peroxide Mixture as Initiator and Its Application 复合引发剂体系引发下氯乙烯悬浮聚合动力学模型及应用
Effects of Anionic Emulsifier/ Long-chain Fatty Alcohol Complex on the Rate of Vinyl Chloride Mini-emulsion Polymerization 复合乳化剂体系对氯乙烯微乳液聚合速率的影响
Development of Living Cationic Vinyl Polymerization 活性碳阳离子聚合进展概述
The influences of the change of pH value of the vinyl chloride polymerization system on the stability of dispersant and the decomposition rate of initiator were introduced. 介绍了氯乙烯聚合反应体系pH值的变化对分散剂的稳定性和引发剂的分解速率的影响。
In this article, we reviewed the recent progress in the initiators of the vinyl cationic polymerization including living and common cationic polymerization, We briefly described the main kinds of the new initiators and the mechanism of initiating. 本文围绕着乙烯基阳离子聚合这一核心,简要地介绍了近年来在阳离子聚合引发剂方面取得的新进展,包括活性阳离子聚合和普通阳离子聚合引发剂两个部分。
The development of living cationic vinyl polymerization since its appearance in 1980's, and its advancement in new monomers and initiators are reviewed. 概述了80年代以来活性碳阳离子聚合出现以后的发展状况及在新单体和新引发剂的探索过程中的进展。
Failure Analysis of the Seals for Vinyl Chloride Polymerization Autoclaves and Technique Improvement 氯乙烯聚合釜密封失效分析及技术改进
A calculation programme for the heat transfer and operation parameters of vinyl chloride polymerization reactor 氯乙烯聚合釜传热和操作参数设计计算
Structural effect on the vinyl polymerization initiated with aromatic tertiary amines 芳香叔胺引发烯类单体聚合研究&单体结构与聚合的关系
Vinyl Polymerization with Titanocenes(ⅳ)& Studies on the Copolymerization of Acrylonitrile and Methyl Methacrylate in the Presence of Titanocene Dichloride 茂钛对乙烯基单体催化聚合(Ⅳ)&二氯二茂钛催化丙烯腈与甲基丙烯酸甲酯共聚合反应的研究
Studies on the kinetics of vinyl polymerization initiated with peroxydisulfate and n, n, n ', n'-tetramethylethylenediamine system 过硫酸盐-N,N,N′,N′-四甲基乙二胺体系引发乙烯基类单体聚合动力学的研究
Style of connection in vinyl polymerization. 乙烯基单体聚合时的键连方式;
In this paper, the structures of three kinds of late transition metal catalysts including Ni, Pd, Co and their characters of vinyl polymerization of norbornene have been introduced, and mechanism of vinyl polymerization of norbornene with Ni and Pd catalysts has been discussed. 主要介绍了Ni、Pd、Co三种金属催化剂各自的结构以及其催化降冰片烯聚合的特点,同时也阐述了Ni、Pd催化剂催化降冰片烯聚合的机理。
These data can be used in regulating the recipes of vinyl chloride polymerization and the particle shape of the PVC resin. 这些数据为改进氯乙烯聚合配方和聚氯乙烯树脂颗粒形态指出了方向。
Progress of Catalysts for Vinyl-Polymerization of Norbornene 降冰片烯加成聚合催化剂的研究进展
Hyperbranched poly ( p-chloromethyl stryrene)( PCMS) was prepared by combining atom transfer radical polymerization ( ATRP) and self-condensing vinyl polymerization ( SCVP). The branches of the hyperbranched PCMS was ended with halogen atoms, which were transferred into azide groups. 用原子转移自由基聚合(ATRP)与自缩合乙烯基聚合(SCVP)相结合合成超支化聚合物聚对氯甲基苯乙烯(PCMS),该聚合物每个分枝均以卤素原子封端。
The vinyl acetate polymerization rate is an important quality indicators in the process of poly vinyl alcohol production, it has an significant impact on economy, security of production process and products final usage. 醋酸乙烯聚合率是聚乙烯醇生产过程中的重要质量指标,它对生产过程的经济性、安全性,以及产品的最终用途有着重要影响。
Many synthetic approaches such as self-condensing vinyl polymerization ( SCVP), reversible addition-fragmentation chain transfer polymerization ( RAFT) and atom transfer radical polymerization ( ATRP) have been used to prepare branched polymers. 自缩合乙烯基聚合、可逆加成断裂链转移聚合、原子转移自由基聚合等多种方法被用来合成超支化聚合物。
Because vinyl chloride polymerization process has the characteristics of strong nonlinearity and coupling, prediction for particle properties of polyvinyl chloride using mechanism modeling is difficult. 氯乙烯悬浮聚合过程具有强非线性、强耦合性的特点,导致难以采用机理建模方法建立精确的聚氯乙烯颗粒特性预测模型。
To solve this problem, an online prediction method of vinyl acetate polymerization rate using soft sensor technology based on least squares support vector machine ( LSSVM) was advanced which is adopts the structural risk Minimization principle. 针对这一情况,本文采用基于结构风险最小化的LSSVM(Leastsquaressupportvectormachine,最小二乘支持向量机)对醋酸乙烯聚合率的在线检测进行软测量方法研究。
However, most of our factories can not be achieve continuous on-line detection of the vinyl acetate polymerization rate due to some technical or economic reasons. 然而由于某些技术或经济方面的原因,目前我国大部分工厂还无法实现对醋酸乙烯聚合率的连续在线检测。