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首页> 外文期刊>Journal of Applied Polymer Science >PREPARATION AND CHARACTERIZATION OF LACTITOL-BASED POLY(ETHER POLYOL)S FOR RIGID POLYURETHANE FOAM
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PREPARATION AND CHARACTERIZATION OF LACTITOL-BASED POLY(ETHER POLYOL)S FOR RIGID POLYURETHANE FOAM

机译：乳基硬质聚氨酯泡沫塑料的制备和表征

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摘要

Propoxylation of lactitol [4-O-beta-D-galactopyranosyl-D-glucitol] under alkaline conditions afforded poly(ether polyol)s (PEP) which have been characterized by their unsaturation content, alpha color, hydroxyl number, viscosity, hygroscopicity, and molecular weight distribution. The analogous sucrose-based PEP were prepared for comparison. Lactitol was found to require shorter reaction times and produced lighter-colored polyols than did sucrose. Polyols produced from lactitol displayed similar physical properties to sucrose-based PEP. Molecular weight analysis by GPC using the universal calibration method showed lactitol PEP to have polydispersities between 1.04 and 1.07. Negligible decomposition of lactitol during propoxylation was confirmed by C-13-NMR and GPC. H-1-NMR of trifluoroacetyl derivatives of lactitol PEP afforded secondary determination of M(n). In addition, rigid polyurethane foams (PURF) formulated with lactitol-, sucrose-, or commercial sucrose-glycerin-based polyols and PAPI 27 were prepared and characterized. Lactitol-based PURF were found to compare favorably with sucrose-based foams, displaying a density and compressive strength of 28.9 kg/m(3) and 1.213 X 10(5) N/M(2), respectively. (C) 1996 John Wiley & Sons, Inc. [References: 30]
机译：在碱性条件下将乳糖醇[4-O-β-D-吡喃并吡喃糖基-D-葡萄糖醇]丙氧基化，得到聚醚多元醇（PEP），其特征在于不饱和含量，α颜色，羟基数，粘度，吸湿性，和分子量分布。制备类似的基于蔗糖的PEP用于比较。发现乳糖醇比蔗糖需要更短的反应时间并且产生浅色的多元醇。由乳糖醇生产的多元醇显示出与基于蔗糖的PEP相似的物理性能。使用通用校准方法通过GPC进行的分子量分析显示，乳糖醇PEP具有1.04至1.07的多分散度。丙氧基化过程中乳糖醇的微不足道的分解通过C-13-NMR和GPC证实。乳糖醇PEP的三氟乙酰基衍生物的1 H NMR进行了M（n）的二次测定。此外，还制备并表征了由乳糖醇，蔗糖或市售蔗糖甘油基多元醇和PAPI 27配制的硬质聚氨酯泡沫（PURF）。发现基于乳糖醇的PURF与基于蔗糖的泡沫相比具有优势，其密度和抗压强度分别为28.9 kg / m（3）和1.213 X 10（5）N / M（2）。 （C）1996 John Wiley＆Sons，Inc. [参考：30]

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