甲基丙烯酸

The bromo-polyethylenegylcol-monomethacrylate was synthesized by two steps. Firstly, methylacrylic acid was esterified with polyethylene glycol (PEG, M=200, 400) to give polyethyleneglycol-monomethacrylate Secondly, treatment of PEG-MA with phosphorus tribromide gave the aim product.

以聚乙二醉（M分别为200，400）和甲基丙烯酸进行单酯化反应，所得单酯再与三溴化磷进行溴化反应合成了一种新的两端具有功能团的不饱和溴化物，即溴代甲基丙烯酸单聚乙二醇酯。

The effects of MMA and alumina trihydrate on properties of oligourethane methacrylate resins were investigated. And the curing reactivities of unsaturated polyester resin, vinyl ester and UM resin were compared by various methods.

研究了甲基丙烯酸甲酯和三水合氧化铝含量对聚氨酯甲基丙烯酸酯树脂性能的影响，比较了不饱和聚酯树脂、乙烯基树脂和UM树脂的固化反应活性。

The polymerized film has better antiwear lifethan the unpolymerized film because polymerization enhances the strenthof the thin film.

并用超分子自组装法将其与甲基丙烯酸十二醇酯和双甲基丙烯酸己二醇酯在玻璃基片上共组装成二氧化钛/有机物复合薄膜。

MATERIALS: Ethylene glycol methacrylate compound with methyl methacrylate was mixed with NaCl solution to obtain porous hydrogel orbital implant; polyurethane membrane was established using electrospinning method. A volume fraction of 75% ethanol was used to make homologous sclera wrappage.

材料：用甲基丙烯酸-β-羟乙酯和甲基丙烯酸甲酯的聚合物单体加入NaCl成孔剂制备多孔水凝胶义眼台；静电纺丝法制备聚氨酯包裹膜；体积分数为75%乙醇浸泡制备同种异体巩膜包裹物。

A series of polymers containing 1,8-naphthalimide moieties in the side chains have been prepared via RAFT technique. Firstly, five styrene and two methyl acrylate based 1,8-naphthalimide monomers were synthesized and characterized. Then, carbazyl group terminated polystyrene was used as macromolecular RAFT agent.

我们合成了5种苯乙烯类和2种甲基丙烯酸酯类萘酰亚胺单体，以一种含末端带咔唑结构的聚苯乙烯为大分子RAFT试剂，考察了所得单体的RAFT聚合，发现苯乙烯类1，8-萘酰亚胺单体可以聚合，但是聚合度不高，甲基丙烯酸酯类1，8-萘酰亚胺单体RAFT聚合不可控。

The PMMA macromer was obtained by radical polymerization in the presence of 2-mercaptoethanol as a chain transfer agent, followed by termination with acryloyl chloride.

甲基丙烯酸甲酯进行自由基溶液聚合，巯基乙醇为链转移剂，然后用丙烯酰氯封端制备了聚甲基丙烯酸甲酯大分子单体。

The macromer, methoxy polyethylene glycol methacrylate, used for polycarboxylate based superplasticizer was prepared by esterification of methacrylic acid and methoxy polyethylene glycol.

以聚乙二醇单甲醚和甲基丙烯酸为主要原料，通过酯化反应制备聚羧酸系减水剂大单体聚乙二醇单甲醚甲基丙烯酸酯。

We found that PMMA was harder to grow water trees when it was put in the same condition as LDPE and the reason was discussed.

本文还在同等条件下对聚甲基丙烯酸甲酯进行了水树枝老化试验，发现与低密度聚乙烯相比，聚甲基丙烯酸甲酯更难于生长水树枝，我们对这一现象产生的原因进行了分析。

The copolymer derived from the copolymerization in high capacity kettle were testified that copolymerization between AN and MMA occurred. The microcapsules in the films are distributed in the copolymer film matrix. The heat-absorbing temperatures and heat-evolving temperatures of the films are almost the same as that of the MOCT, respectively. In addition, the enthalpy efficiency of MOCT, the melting enthalpy and the crystallizing enthalpy rises with the contents of MOCT increasing.The decomposition temperature of copolymers in the films containing various contents of MOCT decreases with the contents of MOCT increasing.

采用30升聚合釜合成了丙烯腈—甲基丙烯酸甲酯共聚物，证实了丙烯腈和甲基丙烯酸甲酯发生了共聚反应；正十八烷微胶囊分散和镶嵌到了共聚物膜基体中；正十八烷微胶囊含量不同的共聚物膜的吸热温度放热温度与纯正十八烷微胶囊的吸放热温度基本相同；随着正十八烷微胶囊含量的增加，共聚物膜的热焓和热效率逐渐增加；共聚物膜中的共聚物的热稳定性温度随着正十八烷微胶囊含量的增加逐渐减小，共聚物膜的结晶度则有所增大。

The synthesization technics of MPEG- MAA was studied in this paper,which is an important intermediate used for preparation of polycarboxylate superplasticizer.

本文对制备聚羧酸系减水剂的重要中间体——甲基丙烯酸聚乙二醇单甲醚酯的合成工艺进行了研究，考察了反应时间、催化剂对甲苯磺酸的用量、阻聚剂对苯二酚的用量、反应温度及甲基丙烯酸与聚乙二醇单甲醚的用量比对酯化率的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。