有机/无机杂化改性聚酯

将合成的聚酯树脂进行有机硅改性,通过正交实验确定有效的改性方法,实验证明:改性后的聚酯树脂其柔韧性和耐酸性能得到明显提高。     

Bifunctional oligoetherols with carbazole ring

A new synthetic method for bifunctional oligoetherols with carbazole ring was presented. 9‐(2,3‐Epoxypropyl)carbazole was obtained from carbazole and epichlorohydrine. The epoxide ring opening occurred upon the consecutive reaction with ethylene glycol to give the semiproduct well soluble in ethylene oxide and propylene oxide and reactive toward these epoxides at temperatures above 60–90°C to form oligoetherols. Structure of these oligoetherols and their physical properties and application for synthesis of linear polyurethanes were studied in details. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

提高酚醛树脂耐热性的研究进展

全面介绍了耐火材料用酚醛树脂的改性方法,包括无机物改性、有机物改性等,着重介绍了最有前景的钼酸、硼酸改性方法和邻苯基苯酚改性方法,说明了其反应原理、改性合成工艺、主要影响因素。对其他几种改性工艺也作了简要说明,并对耐火材料用酚醛树脂改性方法的发展前景作出了分析。     

丙烯酸改性聚酯水分散体纺织涂层的制备

采用新戊二醇、二甘醇、邻苯二甲酸酐、顺丁烯二酸酐等为原料合成了主链上含有双键的聚酯,然后采用含一定亲水基团的丙烯酸混合单体接枝改性聚酯树脂,提高了聚酯树脂的水溶性和成膜性能.由此制备出一种性能优良的环保型纺织涂层.用红外光谱表征了产物的分子结构.讨论了顺丁烯二酸酐用量及中和剂的选择对水分散体性能的影响.     

酚醛树脂的改性研究进展

综述了近3年采酚醛树脂耐热和增韧改性的研究进展简要介绍了各种方法的改性机理及研究现状最后对酚醛树脂改性方法的发展前景作出了展望.     

不饱和聚酯树脂涂料的研究进展

不饱和聚酯树脂(UPR)涂料是发展最早的涂料品种之一,将UPR作为涂料的成膜树脂不但涂膜性能优良而且成本低廉,因此UPR涂料在涂料工业中应用广泛。文章就现有各种UPR涂料的研究进展进行回顾。将UPR涂料分为气干性UPR涂料、防污UPR涂料、防火UPR涂料、防腐UPR涂料、绝缘UPR涂料以及低(零)挥发性有机化合物(VOC)排放UPR涂料。分别阐述了各种涂料的特点及其发展现状,简要叙述了涂料的作用机理,并对UPR涂料的未来发展趋势和研究方向作出了展望。     

Linear oligoetherols and polyurethanes with carbazole ring

Reaction of 9‐(2‐chloroethyl)carbazole with excess of diethanolamine led to 5‐[2‐(carbazol‐9‐yl)ethyl]‐3‐azapentane‐1,5‐diol. The product is well soluble in ethylene and propylene oxides and reacted with them at temperature 60–90°C to give bifunctional oligoetherols with carbazole ring. Structure of these oligoetherols, their physical properties, and application for synthesis of linear polyurethanes were studied in detail. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Influence of TDI concentration on the properties of unsaturated polyester resins

Three different unsaturated polyester resins were modified by toluene diisocyanate (TDI). All the resins studied were commercially available. One, 2, and 3% additions of TDI caused important changes of the resins properties. With an increase of TDI concentration gelation times increased. Suppression of the exotherm peaks—desired effect from practical point of view—was observed. Unfortunately, increase of TDI concentration caused enormous increase of the resins viscosity. Additionally the resins with 3% of TDI exhibit thixotropic properties. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 79: 1201–1206, 2001     

原子灰用不饱和聚酯树脂的性能改进概述

阐述原子灰的组成、树脂结构及固化机理,从不饱和聚酯树脂的角度,对如何改进原子灰各项性能进行了概述。     

聚酯结构对不饱和聚酯基磁性复合材料性能影响

以4种不同结构的不饱和聚酯为黏接剂制备了磁性复合材料,并对复合材料进行力学性能和热性能测试,研究了聚酯结构对此复合材料的性能影响。结果表明,随着单位质量聚酯中双键含量的降低,复合材料的冲击强度先升高后降低,最大为6.1kJ/m2,弯曲性能呈上升趋势,热性能逐渐降低,材料的黏弹性逐渐明显。     

高强型高模低收缩涤纶工业长丝的研发

介绍高强型高模量低收缩（HMLS）涤纶工业长丝的生产工艺,通过调整和优化工艺,提高聚酯切片的特性粘度,改善分子结构,生产出了二代和三代HMLS涤纶工业长丝。研究了HMLS涤纶工业长丝在高温受热条件下物理性能的变化。与一代HMLS涤纶工业长丝相比,三代HMLS涤纶工业长丝的耐热性能提高,热强损失降低。     

Thermal properties and fire behaviour of materials produced from curing mixed epoxy and phenolic resins

Thermal stability and fire behaviour of materials obtained from curing mixed epoxy and phenolic resins have been studied, the decomposition processes being compared with those for the pure resins. Samples were cured by triethylenetetramine or p‐toluenesulphonic acid by isothermal pressing at 90^°C, and decompositions were carried out under nitrogen and air environment from 50 to 1000^°C. Only for mixtures with higher proportion of epoxy resin, the decomposition process goes through a unique step as for the pure resin. Results from fire tests indicated that mixtures are classified as M3 and F1. Copyright © 2008 John Wiley & Sons, Ltd.     

聚酯泡沫反射片的热机械分析

聚酯泡沫反射片以其良好的综合性能在当前液晶显示背光系统中占据主导地位。拉伸取向的聚酯膜在加热时容易产生变形,导致光学不均匀。本文对两种液晶反射片的形貌,高温下的尺寸稳定性,动、静态热机械性能进行了系统研究。结果表明聚酯反射片在加热的过程中先膨胀后收缩,在温度低于Tg时膨胀,温度高于Tg时收缩。膨胀和收缩率大的反射片更容易发生翘曲变形。     

白色纯聚酯粉末涂料的性能研究

介绍了粉末涂料的特点，并从优化涂膜性能的角度研究了粉末涂料原料的选择和使用情况。从羧基聚酯树脂－异氰脲酸三缩水甘油酯（TGIC）体系纯聚酯粉末涂料配方设计入手，研究了基料、填料、助剂对其涂膜物理机械性能（耐冲击力、柔韧性、倾斜流动性、硬度、附着力、抗UV老化等）的影响，给出涂膜综合性能最好的原料配比。     

用聚酯回收料生产对苯型不饱和聚酯树脂的研究

利用聚酯回收料作为原料生产对苯型不饱和聚酯树脂,研究了原料配比和各种工艺参数对产品质量性能的影响,确定了适宜的配方和工艺条件。结果表明:所得对苯型不饱和聚酯树脂具有较高的耐热性、优良的力学性能和耐化学腐蚀性能。     

含钛有机硅树脂改性端羟基饱和聚酯的合成及性能

通过缩聚反应,用含钛有机硅预聚体对端羟基饱和聚酯树脂进行化学改性,用傅里叶变换红外光谱对改性聚酯树脂的结构进行了表征.以封闭型聚异氰酸酯为固化剂将其固化成膜,检测了涂膜的物理机械性能、耐热性以及耐蚀性.结果表明,改性后的聚酯具有良好的物理机械性能,按质量比1:1改性后的聚酯树脂其耐热、耐蚀性能显著提高,开始分解温度从改...     

增白剂KSN改性再生聚酯短纤维

研究了KSN增白剂在废聚酯回收纺丝过程中的应用。通过扫描电镜、红外分析、热重分析、差示扫描量热分析等表征手段,发现KSN增白剂使用量在0.02%~0.05%(与原料质量比)时,其对纤维的熔点、结晶温度和形貌等影响不大,但能改善再生聚酯纤维的热稳定性,并具有良好的纤维增白效果。     

含半结晶聚酯的TGIC型粉末涂料的耐老化性能研究

合成了半结晶型聚酯树脂和无定形聚酯树脂,并以其分别制备了粉末涂料。通过人工加速老化、衰减全反射红外和扫描电镜表征了半结晶和无定形2类聚酯粉末涂层的耐老化性能,发现半结晶聚酯粉末涂料的耐老化性能不如无定形聚酯粉末涂料。     

聚酯热收缩薄膜

本文分析了国内外热收缩膜用聚酯的发展状况 ,指出聚酯热收缩薄膜是目前广泛使用的PVC薄膜的理想替代品。简述了热收缩原理 ,指出热收缩膜用聚酯的发展应从制备改性聚酯和改善成膜工艺两方面着手 ,对热收缩膜用聚酯的市场需求 ,发展方向进行了研究     

Synthesis and thermal stability of novel anion exchange resins with spacer chains

Spacer-modified anion exchange resins were prepared by suspension copolymerization of ω-bromoalkylstyrenes or ω-bromoalkyloxymethylstyrenes with 2–8 mol % of divinylbenzene, followed by quaternization with trimethylamine. The thermal stability of the spacer-modified anion exchangers of the OH form was examined by standing the resins in deionized water at 100–140°C for 30–90 days. The anion exchangers with alkylene chains such as butylene or heptylene groups between the benzene ring and the quaternary nitrogen exhibited higher thermal stability compared with commercial, strongly basic anion exchangers with benzylic ammonium groups. The thermal stability of the exchangers with butyleneoxymethylene or hexyleneoxymethylene spacers was also higher than that of the commercial exchangers. The exchanger with the propyleneoxymethylene spacer, however, had less stability than did the commercial ones. The decreased stability of this spacer-modified exchanger is due to the accelerated degradation of the spacer chain via Hofmann elimination. The excellent stability of the anion exchangers with alkylene or alkyleneoxymethylene spacers, except propyleneoxymethylene, results from the structure of the exchangers, where there are no reactive benzylic carbons, which are attached directly to the quaternary nitrogen. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 64: 1161–1167, 1997