共查询到19条相似文献,搜索用时 761 毫秒
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本文采用悬浮聚合法合成口香糖用聚醋酸乙酯(PVAc)树脂,研究了PVAc的分子量与分散剂用量、分子量调节剂用量、引发剂用量的关系,测量了不同分子量的PVAc的玻璃化温度(Tg)。结果表明,PVAc的分子量可以调节的,Tg随着分子量的增大而提高。 相似文献
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采用溶解度参数原则和混合焓变原则,对聚氯乙烯/聚醋酸乙烯酯共混体系相容性进行了预测,并通过粘度、玻璃化转变温度的分析和显微镜的观察来验证.结果表明,聚氯乙烯和聚醋酸乙烯酯共混体系属于部分相容体系,且相容性与组成有关. 相似文献
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改性聚醋酸乙烯酯喷胶棉粘合剂的合成与研究 总被引:1,自引:0,他引:1
介绍了聚醋酸乙烯酯改性共聚的实验方法,确定了最佳工艺条件.研究表明,改性后的共聚乳液,不仅提高了耐水性,而且提高了弹性. 相似文献
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以醇溶性黑木耳多糖为原料,采用过硫酸铵-碳酸氢钠氧化还原引发体系,进行黑木耳多糖(AAP)/聚醋酸乙烯酯(PVAc)乳液接枝聚合反应。在单因素实验的基础上,以接枝温度、单体配比浓度、接枝时间、引发剂添加量为自变量,共聚物接枝率为响应值,采用响应面法研究各自变量的交互作用,确定了黑木耳醇溶性多糖接枝聚合最佳工艺:温度60℃,反应时间2.5h,多糖与PVAc比例为1:3,引发剂量占PVAc质量的4%,在该条件下聚合物接枝率达37.6%。实验结果为高分子天然产物研究提供理论依据。 相似文献
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以醇溶性黑木耳多糖为原料,采用过硫酸铵-碳酸氢钠氧化还原引发体系,进行黑木耳多糖(AAP)/聚醋酸乙烯酯(PVAc)乳液接枝聚合反应。在单因素实验的基础上,以接枝温度、单体配比浓度、接枝时间、引发剂添加量为自变量,共聚物接枝率为响应值,采用响应面法研究各自变量的交互作用,确定了黑木耳醇溶性多糖接枝聚合最佳工艺:温度60℃,反应时间2.5h,多糖与PVAc比例为1:3,引发剂量占PVAc质量的4%,在该条件下聚合物接枝率达37.6%。实验结果为高分子天然产物研究提供理论依据。 相似文献
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针对目前国标没有口香糖中VC含量的检测方法,结合已有国标VC测定方法的基础上进行改良试验。对口香糖样品进行快速溶解,使样品中的VC溶解进入含有乙酸的溶液中,与固蓝盐B反应生成黄色的草酰肼-2-羟基丁酰内酯衍生物。在其最大吸收波长420 nm处,用紫外可见分光光度计测定其含量。本方法的线性范围1μg/mL~20μg/mL,检出限为1μg/mL,样品加标回收率在90.9%~98.6%,相对标准偏差为1.57%。 相似文献
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为了使无糖口香糖大众化,对无糖口香糖原料性能进行了研究。通过2.5 L小捏合机反复调试配方,经过多次流水线试验,目前产品已进入实质性生产阶段。其口味佳,价格适中,市场前景好。该款产品符合SB/T100023-2008标准。 相似文献
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The relationship between duration and maximum intensity of sweetness and peppermint flavor of chewing gum was explored using dual-attribute time-intensity sensory evaluation. Four chewing gum samples, varying in rate of release of sweetness and peppermint flavor were evaluated by 10 trained time-intensity panelists. Chewing gum with a fast release of sweetness and peppermint flavor provided the highest maximum intensity and longest duration of sweetness and peppermint perception. The rate of release of sweetness was more important than rate of release of peppermint flavor in affecting duration of attributes. 相似文献
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This study was conducted to determine the feasibility of using corn zein as a natural gum base to be an alternative to the currently used synthetic gum base. The objectives were to (1) develop a corn zein chewing gum and (2) evaluate the taste, texture, and aroma qualities compared with synthetic gum base using a time‐intensity (T‐I) method. Four corn zein gum samples, each made with a different plasticizer (oleic acid, glycerin, propylene glycol, and 1 without any plasticizer), were included in the study along with 2 synthetic gum‐base samples. Nine panelists participated in the T‐I study. Thirteen attributes were evaluated. Maximum intensity, time to maximum intensity, and duration were parameters extracted from the T‐I curve. The synthetic gum‐base samples were rated higher for the maximum intensity of sweet taste and cinnamon aroma‐by‐mouth and lower for the maximum intensity of bitter taste. The propylene glycol corn zein sample was rated the highest for cinnamon aroma and the lowest for stale, rancid, and cheesy aromas. Out of the corn zein gums, the oleic acid sample was rated the lowest for the maximum intensity of hardness. It was also rated highest for the maximum intensity of bitter taste and the lowest for sweet taste. This study showed that it is feasible to use corn zein as a gum base, but future work is needed to develop an acceptable product for consumers. 相似文献
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