甲基丙烯酸甲酯

In this paper,natural pyrethrum nano-capsule with a wall of the copolymer of styrene and methyl methactylate was prepared by means of microemulsion polymerization .

研究用微乳液聚合法制备以甲基丙烯酸甲酯和苯乙烯共聚体为囊壁，以天然除虫菊酯为囊芯的纳米胶囊。

Polymethyl methacrylate is the most used filling materials at present; There is not significant difference between unipedicular and bipedicular vertebroplasty; Using vertebral body venography and appropriate dense bone cement can reduce leakage of bone cement; Bolster for self-replacement can rebound vertebral body height, and balloon kyphoplasty and sky bone expander kyphoplasty can be avoided; In order to reduce refracture of vertebral body, anti-osteoporosis drugs should be used in the treatment of percutaneous vertebroplasty.

聚甲基丙烯酸甲酯是目前最常用的填充物；单侧注射和双侧注射疗效没有明显差别；应用对比剂及掌握合适的骨水泥黏稠度可以减少骨水泥的渗漏率；成形前腰部垫枕自身复位可以恢复椎体的高度，避免采用操作复杂及价格昂贵的球囊后凸成形及骨膨胀椎体后凸成形；进行经皮椎体成形时应该配合应用抗骨质疏松药物，以减少椎体再骨折的发生。

The relationship between water tree growth speed and its influence factors, such as aging time, frequency of electrical field, and relative permittivity, was studied in this paper.

按照建立的水树枝老化试验装置和方法标准，本文对低密度聚乙烯和聚甲基丙烯酸甲酯两种固体片状材料进行了水树枝老化规律的试验研究，重点研究了低密度聚乙烯材料中水树枝引发和发展的影响因素和规律，包括盐溶液的浓度对低密度聚乙烯中水树枝形态的影响，老化时间、外施电压频率、盐溶液的电容率与水树枝生长速度的关系。

IR, SEM and TEM showed that the encapsulation film, which is composed of poly modified by silane, is a dense reticulation with a thickness of 20~30nm.

IR、SEM和TEM测试结果表明，该有机包覆层由硅烷改性的聚甲基丙烯酸甲酯组成，是一种厚度为20~30nm的致密网状膜。

When SiO〓-NH〓-Rh-Co complex was used to catalyze the hydroformylation of methyl methacrylate, an optimal conversion of 93.4% and optimal selectivity of 84.4% for the normal aldehyde were both obtained at Rh/Co ratio of 2/1, which were both higher than that catalyzed by SiO〓-SiNH〓-Rh and SiO〓-Si-NH〓-Co momometallic catalysts. Clearly a synergistic action between Rh and Co atoms presented in the complex.

我们以SiO〓-Si-NH〓-Rh-Co催化甲基丙烯酸甲酯的醛化反应，当催化剂中Rh/Co比为2/1时，催化活性最高，可达93.4％，对正构产物β-甲酰异丁酸酯的选择性达到84.4％，都高于单金属催化剂，表明了金属间存在相互作用。

The surface of sisal fiber was modified by alkali treatment and graft-polymerization of methylmethacrylate, respectively.

分别用碱处理和甲基丙烯酸甲酯接枝聚合的方法对SF进行表面改性。

I have MMA gloves from Canbox.ca, and they make my fists feel like a couple of rocks…and definately not good for your sparring partner's face!

我有甲基丙烯酸甲酯手套从canbox.ca ，他们让我的拳头觉得像一对夫妇的岩石……而且，绝对不是良好的为您掀起合作伙伴的脸！

Therefore, the linearized equation representing the dependence of Tg on the content of iso-, syndic- and heterotriads can only be used for the PMMA with the same type of stereodiads distribution.

本文研究了聚甲基丙烯酸甲酯的立构规整性与T8的关系，结果表明立构单元分布和含量均对T8有显著影响。

In the meantime, I want to discuss what qualities a trainee who's new to MMA should strive for.

在此同时，我想讨论什么样的品质学员谁的新的甲基丙烯酸甲酯应该争取。

Objective To evaluate the clinical effect of treating thoracolumbar tumorous pain by percutaneous vertebroplasty.

目的 评价经皮穿刺骨水泥聚甲基丙烯酸甲酯灌注椎体成形术治疗胸腰椎肿瘤疼痛的疗效。

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。