聚合物降解

关于紫外线辐射使聚合物降解的原理，专家们是有分歧的。

The mechanism of polymer degradation by ultraviolet radiations is not agreed upon by experts .

这由于它们通过氧化还原作用，使聚合物降解过程中过氧化物分解活化能大幅度降低的缘故。

Due to the extensive decrease of active energy for decomposition of peroxides in the polymer degradation through the redox reaction .

回顾了最近10a国内外聚合物降解与稳定化理论的研究进展，指出稳定化助剂的技术发展趋势，介绍了热稳定剂、抗氧剂和光稳定剂品种的开发动向。

Research progress of theory of degradation and stabilization of polymers in recent ten years in the world was reviewed . Technological development trend of stabilizers and heat stabilizers , antioxidants and light stabilizers to be developed was introduced .

聚合物降解产物伤害与糖甙键特异酶破胶技术

Polymeric Fragment Damage and Polymeric Linkage-Specific Enzyme Breaker Technology

综述了近年来生物降解微球在制备工艺、聚合物降解机理、药物释放等方面的研究进展。

The preparation , mechanism of polymer degradation in vitro and drug release mode of biodegradablemicrospheres are reviewed .

综述了超声波在聚合物降解及合成中的最新进展。

This paper discussed the recent research development of using ultrasonic waves in polymer processing in several aspects .

依据这些试验结果，结合了微球大小和聚合物降解度对于药物释放的作用得到了相应的数学上的结论。

Based on these experimental results , a suitable mathematical theory has been developed that incorporates the effect of microsphere size distribution and polymer degradation on drug release .

XPS在聚合物表面降解研究中的应用

Advances in XPS applied to surface degradation of polymers

本文详细介绍了X射线光电子能诣（XPS）在聚合物表面降解研究中的应用。

The article details the advances in X-ray photoelectron spectrcopy ( XPS ) applied to surface degradation of polymers .

PS超临界流体脱挥分具有能耗低、传质效率高的特点，而且不会引起聚合物的降解；

Devolatilization of PS with supercritical fluid had the advantage of low energy loss and high efficient mass transfer while avoided the degradation of the polymer .

聚合物生物降解ASTM测试中的问题及其标准测试方法

ASTM Testing Methods to Biodegradable Polymers : the Existing Problems and the Standard Testing Method Being Formulated

采用SEM、GPC1、H-NMR和DSC技术研究了聚合物在降解过程中形貌、分子量及分子量分布、失重率、组成和热性能的变化，并对降解机理进行探讨。

The changes of molecular weight , molecular weight distribution ( polydispersity ), loss weight , composition of the polymer and thermal properties were determined by SEM , GPC , ~ 1H-NMR and DSC techniques , furthermore the dynamic and static degradation mechanism is discussed .

对聚琥珀酸丁二酯（PBS1）采用两步法辐照，比其它辐照法得到的凝胶含量高，这是由于在室温下预先辐射所形成的交联网络结构减少了聚合物的降解。

Poly ( butylene succinate ),( PBS1 ) was rays irradiated by two step irradiation ( irradiation in 100 ℃ after irradiation at room temperature ) gave the higher gel content . This is due to formed network structure by preirradiation at room temperature leads to less degradation .

在超声辐射作用下聚合物的降解和接枝（嵌段）共聚

Studies on ultrasonic degradation and block ( graft ) copolymerization of polymers

硫脲和硫代硫酸钠均可减轻污水溶液中聚合物的降解。

Thiourea or sodium thiosulfate can reduce polymer degradation in RPW solutions .

聚合物线性降解计算机模拟及程序开发

Computer simulation and program development of polymer degradation

乳酸扩链聚合物的降解性能

Degradable behaviors of lactide chain-extened polymers

微生物对几种水溶性聚合物的降解作用

Microbial Degradation of Water-Soluble Polymer

超声波幅照下聚合物的降解

Ultrasonic Degradation of Polymer

介绍国外研究人员利用双螺杆挤出机的新技术，包括用双螺杆挤出机生产接枝聚合物，降解高分子等；

In this paper , the technique on producing special polymers in the twin screw extruder was introduced .

随加热速率的提高，聚合物的降解由分解控制转变为扩散控制过程。

The decomposition of the polymer was transformed from decomposition-controlled process into diffusion-controlled process as the heating rate was increased . 3 .

结果表明：酯键含量越高，质量损失就越快。聚合物的降解受酸、碱催化。

Results showed that the degradation rate of PEAs increased with the content of ester block , and was catalyzed by acid or base .

为归纳聚合物超声降解动力学的一般表达式，对常用动力学方程的适用性进行了探讨。

In order to conclude a general expression of ultrasonic degradation kinetics for polymers , the general applicability of the common kinetics equations was discussed .

本文阐述了生物降解聚合物的降解机理、淀粉基生物降解聚合物的制造、淀粉基生物崩解型和完全生物降解型聚合物的研究现状和发展趋势。

This paper reviews the biodegradation mechanism the biodegradable polymer , the preparation of the starch-based biodegradable polymer , the studies and development trend of the bio-disintegrable and biodegradable polymer .

本文在介绍超（近）临界水性质的基础上，主要对近年来超（近）临界水中的有机合成、无机化学反应、生物质的转化反应及聚合物的降解等方面的研究进展进行了回顾总结。

Chemical reactions in super-and subcritical water , including organic reactions , preparation of inorganic particles , the transform of biomass to chemical compounds , and the decomposition of polymers are reviewed .

壁面钢材受溶解氧腐蚀而产生Fe2+，Fe2+被氧化成Fe3+并引起溶液中聚合物化学降解；温度升高时化学降解加剧。

The pipe steel corroded by dissolved oxygen releases Fe 2 + and Fe 2 + is oxidized to Fe 3 + and causes chemical degradation of polymer which is enhanced at elevated temperatures .

具有良好的抗热氧化性能的致密炭层，能够有效地阻止火焰和基体之间的物质和能量交换，延缓聚合物的降解过程，从而达到终止燃烧的目的。

The char layer with high thermal oxidative resistance and compact structure could effectively inhibit the energy and mass transfer between the flame and matrix , delayed the degradation of inner polymer , and thus retarded the combustion . 5 .

通过测定体系的粘度损失值，研究了Fe2＋，S2O2－8等物质对聚合物的降解作用，考察了降解剂浓度、温度、酸度等因素对反应的影响。

By means of measuring the loss of viscosity of polymer solution , the experiments were conducted which showed the effect of Fe 2 + and S 2O 2 - 8 concentration , temperature and pH on the degradation reaction .

介绍了超声波作用下的有机合成、聚合物的降解和聚合、水体中有毒有机污染物治理以及超声波在干燥、萃取、均化及超分子材料体（微泡）制备中的应用现状。

This paper introduces the organic synthesis , the degradation polymerization of polymers , and the treatment of toxic organic matter in water with the ultrasonic waves and the status quo of application of supersonic waves in dryness , extraction , homogenization and the preparation of supermolecule materials .

MonteCarlo方法模拟的线性聚合物无规降解行为

Modeling random degradation reaction of linear polymer by Monte Carlo way