摘要:
A facile synthesis of amphiphilic hyperbranched polymers consisting of poly(amic acid) and polyimide was developed via “A2+B3” approach from difunctional anhydride and trifunctional hydrophilic poly(oxyalkylene)triamine. Various amphiphilic hyperbranched poly(amic acid)s (HBPAAs) with terminal amine functionalities and amic acid structures were prepared through ring-opening polyaddition at room temperature, followed by thermal imidization process for the formation of hyperbranched polyimides (HBPIs), accordingly. The resulting HBPIs were analyzed by GPC, indicating the molecule weights of 5000˜7000 g/mol with a distribution of polydispersity between 2.0 and 3.8. The amine titration for HBPIs indicated the peripheral total-amine contents to be 8.32˜18.32 mequiv/g dependent on compositions.
摘要:
Disclosed is a method for making waterborne polyurethane with a reactive functional group. The method includes the step of introducing a short-chain diol monomer with a reactive functional group into waterborne polyurethane polymer by pre-polymerization to provide a polyurethane pre-polymer with the reactive functional group connected to a side chain and the step of reacting the pre-polymer with hydrophilic diamine for chain extension and inter-crosslink to provide waterborne polyurethane with different crosslink degree. The short-chain diol monomer is expressed by structural formula (I) and the polyurethane pre-polymer with the reactive functional group connected to the side chain is expressed by structural formula (II) as follows: A is azetidine-2,4-dione functional group or malonamide-linked alkyl group and B is nitrogen-linked di-hydroxy terminal group or tertiary amine-linked di-hydroxy terminal group R1 is diisocyanate, and R2 is a polyol backbone and wherein IG is a neutralized ionic group.
摘要:
The invention discloses a cross-linked epoxy resin with flame-retardant properties and method for producing the same. The polymeric material of the invention includes an epoxy resin, a curing agent and a modification agent. Particularly, the modification agent is a derivative of 9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO). Moreover, the curing agent is 4,4′-diaminodiphenyl methane (DDM), or tris(4-aminophenyl)amine (NNH).
摘要:
Methods for producing dendrons of different generations with hydrophobic functional end-groups, and for producing polyurethanes with the side-chain dendrons are disclosed step-by-step. The dendron with hydrophobic functional end-groups in the polyurethane systems, and the honeycomb-like structure thin films are obtained by a breath-figure process. The structures of dendrons and dendritic side-chain polyurethanes are respectively expressed in the following and the end-groups (R) of the dendron are long alkyl chains or perfluoroalkyl derivatives.
摘要:
An organic polyurethane shape memory material includes a C10 chain or C18 chain and consists of hard segment and soft segment. The material is produced by reacting the single-chain type dendrimer with diethylenetriamine to produce dendrimer. Then dendrimer reacts with N-(3-aminopropyl)diethanolamine to produce dendritic diols. Next, polymer HO(C6H10O2)xC2H4OC2H4(C6H10O2)yOH, where x+y=25˜26, reacts with methylenedi-p-phenyl diisocyanate, and at least one type of dendritic diols is added to produce the organic polyurethane shape memory material.
摘要翻译:有机聚氨酯形状记忆材料包括C10链或C18链,由硬链段和软链段组成。 该材料通过使单链型树枝状聚合物与二亚乙基三胺反应制备树枝状聚合物而制备。 然后树枝状大分子与N-(3-氨基丙基)二乙醇胺反应产生枝状二醇。 接下来,将聚合物HO(C6H10O2)xC2H4OC2H4(C6H10O2)yOH(其中x + y = 25〜26)与亚甲基二苯基二异氰酸酯反应,并加入至少一种类型的树枝状二醇以制备有机聚氨酯形状记忆材料。
摘要:
A method for making a side-chain dendrimer vesicle includes the following steps. At first, there is provided a random copolymer with a narrow distribution of molecular weights by active polymerization and chemical modification. Then, chemical modification is executed to graft various generations of dendrimers to the random copolymer to provide a side-chain dendritic random copolymer with various generations. Two steps of emulsification are taken to induce macromolecular self-assembling of the side-chain dendritic random copolymer solution to form the macromolecular vesicle. The side-chain dendrimer includes C10˜C18 hydrophobic alkyl chains.
摘要:
The invention discloses a novel cross-linked epoxy resin with flame-retardant properties and method for producing the same. The polymeric material of the invention includes an epoxy resin, a curing agent and a modification agent. Particularly, the modification agent is a derivative of 9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-Oxide (DOPO). Moreover, the curing agent is 4,4′-diaminodiphenyl methane (DDM), or tris(4-aminephenyl)amine (NNH).
摘要:
An organic polyurethane shape memory material and a preparation method thereof are disclosed. The organic polyurethane shape memory material includes a C10 chain or C18 chain and it consists of hard segment and soft segment. The preparation method thereof includes the steps of:The single-chain type dendrimer reacts with diethylenetriamine to produce multiple chains type dendrimer. And then at least one type dendrimer reacts with N-(3-aminopropyl)diethanolamine to produce at least one type dendritic diols. Next polymer HO(C6H10O2)xC2H4OC2H4(C6H10O2)yOH, x+y=25˜26 reacts with methylenedi-p-phenyl diisocyanate and then at least one type dendritic diols is added to react so as to get organic polyurethane shape memory material. The material of the present invention overcomes shortcoming of metal alloy and ceramic such as poor processability, difficulty in modification and high cost. Moreover, it also increase mechanical properties of polymer.
摘要:
A method for preparing a biphenylphosphonate compound of the following formula (I): wherein n is 2 or 3; Ar is a C6-C16 aromatic group; which comprising (a) reacting an o-phenylphenol with a phosphorus trichloride in the presence of a zinc chloride catalyst to form a 6-chloro-6H-dibenz [c,e] [1,2]oxaphosphorin of the following formula (II); (b) reacting a polyhydroxybenzene compound of the formula (III) (HO)n—Ar (III) wherein n and Ar are defined the same as the above, with the compound of formula (II) to form a compound of the following formula (IV) wherein n and Ar are defined the same as the above; and (c) oxidizing the compound of formula (IV) in the presence of water and ozone to form the compound of formula (I).
摘要:
A method for preparing a biphenylphosphonate compound of the following formula (I): wherein n is 2 or 3; Ar is a C6–C16 aromatic group; which comprising (a) reacting an o-phenylphenol with a phosphorus trichloride in the presence of a zinc chloride catalyst to form a 6-chloro-6H-dibenz [c,e][1,2] oxaphosphorin of the following formula (II); (b) reacting a polyhydroxybenzene compound of the formula (III) (HO)n—Ar (III) wherein n and Ar are defined the same as the above, with the compound of formula (II) to form a compound of the following formula (IV) wherein n and Ar are defined the same as the above; and (c) oxidizing the compound of formula (IV) in the presence of water and ozone to form the compound of formula (I).