Synthesis and viscosity behavior of poly(γ‐p‐biphenylmethyl‐L‐glutamate) in benzene/dichloroacetic acid mixtures, a comparison with poly(γ‐benzyl‐L‐glutamate)
Synthesis and viscosity behavior of poly(γ‐p‐biphenylmethyl‐L‐glutamate) in benzene/dichloroacetic acid mixtures, a comparison with poly(γ‐benzyl‐L‐glutamate)
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苯/二氯乙酸混合物中聚（γ-对联苯甲基-L-谷氨酸）的合成和粘度行为，与聚（γ-苄基-L-谷氨酸）的比较
DOI：
10.1002/macp.1974.021751113
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发表时间：
1974
影响因子：
2.5
通讯作者：
A. Bantjes
中科院分区：
文献类型：
--
作者：
J. Feijen;W. Sederel;K. Groot;A. D. Visser;A. Bantjes
本文报道了聚（γ-对联苯基甲基-L-谷氨酸酯）PBPLG（聚{L-亚氨基-1-[2-（4-联苯基甲氧羰基）乙基]-2-氧代乙烯}）（1d）的合成。研究了该聚合物在苯/二氯乙酸（c= 0，2.10 - 3 - 1，4.10 - 3g/cm ~ 3）混合溶剂中的粘度行为。将结果与在相同条件下对聚（γ-苄基-L-谷氨酸盐）PBLG（聚[L-亚氨基-1-（2-苄氧基羰基乙基）-2-氧代乙烯]）（1c）的测量进行比较。从刚性氢键合螺旋到无规溶剂化卷曲的转变对于两个阶段都发生：PBPLG（第一阶段0- 55%，第二阶段55-100%二氯乙酸）和PBLG（第一阶段0- 70%，第二阶段70-100%二氯乙酸）。
因此，在PBLG中引入对苯基取代基导致苯/二氯乙酸混合物中的螺旋不太稳定。
PBLG在苯/二氯乙酸（c= 0，2.10 ~（-3）-1，4.10 ~（-3）g/cm ~ 3）中的稳定性和粘度行为与PBLG在间甲酚/二氯乙酸（c= 1，0.10 ~（-3）-4，0.10 ~（-3）g/cm ~ 3）中的行为非常相似。
The synthesis of poly(γ-p-biphenylmethyl-L-glutamate), PBPLG, (poly{L-imino-1-[2-(4-biphenylylmethoxycarbonyl)ethyl]-2-oxoethylene}), (1d) is described. The viscosity behavior of this polymer in benzene/dichloroacetic acid mixtures (c=0,2.10 -3 - 1,4.10 -3 g/cm3) at 25°CC is investigated. The results are compared with measurements on poly(γ-benzyl-L-glutamate), PBLG, (poly[L-imino-1-(2-benzyloxycarbonylethyl)-2-oxoethylene]), (1c) under the same conditions. A transition from a rigid hydrogen bonded helix to a random solvated coil occurs in two stages for both: PBPLG (first stage 0-55%, second stage 55-100% dichloroacetic acid) and PBLG (first stage 0-70%, second stage 70-100% dichloroacetic acid).
Therefore, the introduction of a p-phenyl substituent in PBLG leads to a less stable helix in benzene/dichloroacetic acid mixtures.
The stability and viscosity behavior of PBLG in benzene/dichloroacetic acid mixtures (c=0,2.10 - 3 - 1,4.10 - 3g/cm3) is quite similar to the behavior of PBLG in m-cresol/dichloroacetic acid mixtures (c=1,0.10 - 3 - 4,0.10 - 3 g/cm3).