马来酸二丁酯虚拟玻璃他温度的测定及其在涂料粘合剂中的应用

通过实验计算出马来酸二丁酯的虚拟玻璃化温度，并研究了它在醋丙、苯丙乳液体系中的应用。结果表明：马来酸二丁酯在涂料、粘合剂方面可以全部或部分代替丙烯酸丁酯，对降低相关产品的成本具有重要意义。     

马来酸二丁酯虚拟玻璃化温度的测定及其在涂料粘合剂中的应用

通过实验计算出马来酸二丁酯的虚拟玻璃化温度,并研究了它在醋丙、苯丙乳液体系中的应用。结果表明:马来酸二丁酯在涂料、粘合剂方面可以全部或部分代替丙烯酸丁酯,对降低相关产品的成本具有重要意义。     

用磷铝杂原子固体酸催化剂合成马来酸二丁酯

以自制的磷铝杂原子固体酸催化剂催化合成了马来酸二丁酯，考察了反应时间、醇酸摩尔比、带水剂用量、催化剂用量等对酯化率的影响；同时考察了催化剂的重复使用性。对酯化产物物理性能进行了测试，其实测值与文献值相符。     

聚马来酸二丁酯虚拟玻璃化温度的测定及其在乳液体系中的应用

在乳液共聚合的基础上计算了聚马来酸二丁酯(PDBM)的虚拟玻璃化温度,并研究了它在醋丙、苯丙和纯丙乳液体系中的应用。结果表明,聚马来酸二丁酯的玻璃化温度为-15.36℃,该单体在涂料、粘合剂方面可以部分代替丙烯酸丁酯,降低产品的成本。     

氯化铁催化合成马来酸二丁酯

在氯化铁（ＦｅＣｌ３·６Ｈ２Ｏ）催化剂存在下从马来酸酐和正丁醇制备了马来酸二丁酯，当马来酸酐、正丁醇和氯化铁的摩尔比为１∶６∶００７４，反应温度１１５℃～１２４℃，反应时间１２０～１４０分钟时，该酯收率达９０％     

氯化铁催化合成马来酸二丁脂

在氯化铁催化剂存在下从马来酸酐和正丁醇制备了马来酸二丁酯,当马来酸酐,正丁醇和氯化铁的摩尔比为１：６：０．０７４,反应温度１１５－１２４℃,反应时间１２０－１４０分钟时,该酯收率达９０％。     

马来酸二丁酯的合成

本文主要阐述马来酸二丁酯的性能、小试合成、工业生产及技术经济指标。其中用固体催化剂生产的产品具有全顺式结构,用混合液体催化剂生产工艺简单,反应时间短,得率高。     

ZnCl_2/活性白土催化剂的制备及其催化Diels-Alder反应研究

采用等体积浸渍法制备了活性白土负载ZnCl2固体酸催化剂,并以脂肪酸甲酯与马来酸二丁酯合成C22-环脂肪三酸酯的Diels-Alder反应评价其催化性能。考察了ZnCl2负载量及焙烧活化温度对催化剂活性的影响;比较了几种不同催化剂的催化活性,结果表明,ZnCl2负载量为0.5 mmol/g,在300℃下焙烧活化4 h所制得的催化剂,可以使脂肪酸甲酯与马来酸二丁酯反应生成C22-环脂肪三酸酯的收率达到58.5%。ZnCl2/活性白土负载型催化剂的活性明显大于载体(活性白土)活性与ZnCl2活性的简单加和。利用XRD、TG-dTG等分析测试手段对活性白土负载ZnCl2催化剂的结构进行了表征。结果表明,经活化处理ZnCl2与载体(活性白土)内表面的羟基之间发生了化学键合,形成了新的活性物种Zn(OH)Cl,从而提高了催化剂的催化活性。     

马来酸二丁酯熔融接枝聚丙烯的研究

用马来酸二丁酯作为接枝单体对聚丙烯进行了熔融接枝改性研究。以自由基机理为基础讨论了共混温度、共混时间和反应物组成等对接枝率的影响。通过测定结晶速率和动态力学损耗的方法研究了接枝对聚丙烯的结晶行为和动态力学性质的影响。     

顺丁烯二酸二丁酯的合成和应用

顺丁烯二酸二丁酯(即马来酸二丁酯)是合成高分子化合物的重要单体,同时也是有机合成的重要原料和溶剂,近年来颇为国际化工界重视,每年均有大量文献报导。顺丁烯二酸二丁酯化学结构为     

氨磺酸催化合成马来酸二丁酯的研究

研究了以氨磺酸为催化剂，马来酸和正丁醇为原料合成马来酸二丁酯，并考察了影响反应的因素。结果表明，醇酸物质的量比为3：1，催化剂用量为0．5g(马来酸为0．05mol的情况下)，带水剂甲苯为5mL，反应时间为1．5h是量适宜的反应条件，醇化率达96．8％。     

稀土固体超强酸SO_4~(2-)/TiO_2/La~(3+)催化合成马来酸二丁酯

以固体超强酸SO4 2 -/TiO2 /La3 + 为催化剂 ,马来酸和正丁醇为原料合成马来酸二丁酯 ,考察了影响反应的因素。结果表明 :n (醇 )∶n (酸 ) =4 0∶1 ;催化剂用量为 1 0g (马来酸为 0 1mol的情况下 ) ;带水剂甲苯为 1 5mL ;反应时间为 3 0h是最适宜的反应条件 ,酯化率达 97 4 %。     

合成马来酸二丁酯催化剂的研究进展

评述了对甲苯磺酸、氨基磺酸、强酸性阳离子交换树脂、六水三氯化铁、树脂固载三氯化铝、五水四氯化锡、十二水合硫酸铁铵、一水硫酸氢钠、硫酸铁、固体超强酸、杂多酸、钛酸酯、铌酸和分子筛等催化剂催化合成马来酸二丁酯的方法。认为氨基磺酸、一水硫酸氢钠、固体超强酸、杂多酸、铌酸、分子筛和固载型催化剂等是合成马来酸二丁酯具有实用价值的催化剂。     

顺丁烯二酸酐及其衍生物溶液接枝改性聚苯乙烯的研究

文章介绍了分别将顺丁烯二酸酐，顺丁烯二酸一丁酯和顺丁烯二酸二丁酯与聚苯乙烯的二甲苯溶液在过氧化二苯甲酰引发下的接枝反应，讨论了反应单体浓度、引发剂用量接枝率的影响，测试了接枝物的成膜性能。     

Grafted syndiotactic polystyrene synthesized via melting graft copolymerization used as a compatibilizer for immiscible syndiotactic polystyrene/polyadimide 66 blends

A new grafted syndiotactic polystyrene (g‐sPS), to be used as a compatibilizer for syndiotactic polystyrene (sPS)/polyadimide 66 blends, was prepared by the melting graft copolymerization of sPS and monomers composed of itaconic acid and dibutyl maleate with dicumyl peroxide as an initiator. The resulting g‐sPS possessed a side‐chain structure identified by IR spectra, and the results of mechanical testing show that a good impact strength and tensile strength were obtained for g‐sPS at a 7.16‐phr addition of monomer with a 3:1 proportion of dibutyl maleate and itaconic acid. Differential scanning calorimetry and scanning electron microscopy analysis indicated that the g‐sPS maintained a high glass‐transition temperature and a crystalline structure. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1659–1666, 2005     

Thermal degradation of poly(vinyl chloride) in alkyl maleates

The thermal degradation of poly(vinyl chloride) has been investigated in diethyl, dibutyl and dioctyl maleate under nitrogen from 160°C to 210°C. The rate of dehydrochlorination was highest in dibutyl maleate and lowest in dioctyl maleate. The apparent activation energy calculated from the average value of the rate constant at each temperature for diethyl, dibutyl and dioctyl maleate was found to be 83.6 kJ mole^?1, 112.7 kJ mole^?1, and 150.5 kJ mole^?1, respectively. The rates of dehydrochlorination and the activation energy observed in alkyl maleates are higher than those observed in ethyl benzoate. In the visible range spectra the absorption at higher wavelengths is considerably reduced in alkyl maleates.     

Compatibility effect of radiation‐grafting‐functionalized styrene–butadiene–styrene on polyamide 6/styrene–butadiene–styrene blends

Styrene–butadiene–styrene (SBS) was grafted with dibutyl maleate (DBM), methacrylic acid (MAA), or maleic anhydride (MAH) by ⁶⁰Co γ‐rays. The grafted SBS was blended with polyamide 6 (PA6). The compatibility of the PA6/SBS blends was studied with scanning electron microscopy and rheological measurements. The results showed significant improvement in the compatibility of PA6 blended with MAH‐ or MAA‐grafted SBS, with the former being more effective, whereas grafting DBM was ineffective in this respect. Mechanisms of the compatibility enhancement and ineffectiveness are discussed. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

酸掺杂聚苯胺催化马来酸丁酯化及动力学

用对甲苯磺酸作为搀杂剂对水相氧化法合成的盐酸搀杂的聚苯胺(HC l/PANI)进行搀杂,制备了由聚苯胺(PANI)负载对甲苯磺酸的固体酸催化剂(PTSA/PANI)。以PTSA/PANI为催化剂、马来酸酐和正丁醇为原料合成马来酸二丁酯。考察了原料配比、催化剂用量和反应时间等因素对反应的影响以及催化剂的重复使用性能,测定了反应动力学。最佳反应工艺条件为:n(正丁醇)∶n(马来酸酐)=3.33∶1、w(PTSA/PANI)=3.81%、反应温度≤130℃、反应时间3 h。结果表明,在该条件下马来酸酐的转化率为96.23%;催化剂经重复使用5次后,马来酸酐的转化率为90.82%;确定反应级数为二级,表观活化能为41.0 kJ/mol。对甲苯磺酸搀杂聚苯胺催化剂具有催化活性高、稳定性好、容易制备、无环境污染等优点。     

Improvement of film properties of vinyl acetate based emulsion polymers by using different types of maleic acid diesters

Two types of maleic acid diesters, dibutyl maleate (DBM) and dioctyl maleate (DOM) were used as comonomers in semicontinuous emulsion copolymerization of vinyl acetate (VAc) in order to improve the film properties of poly(vinyl acetate), PVAc emulsion polymer. The effects of the comonomer type and comonomer ratio on minimum film forming temperature (MFFT), glass transition temperature (T_g), polymer structure, molecular weights, water contact angle and water resistance of PVAc latex films were examined. It was found that MFFT and T_g of the PVAc emulsion polymer decreased by the presence of the maleic acid disters in copolymer composition. This decrease was more affected by the increasing content and alkyl chain length of the comonomers. The molecular weights of the emulsion polymers were also affected by the comonomers and their ratios. Moreover, hydrophobicity and water resistance of the PVAc latex films were increased by using DBM and DOM as comonomer.