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A kind of pla/ppc/hbp derivative blend and preparation method thereof

A blend and melt blending technology is applied in the field of PLA/PPC/HBP derivative blends and their preparation, which can solve the problems of insignificant modification effect and large difference in polarity.

Active Publication Date: 2020-04-28
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large difference in polarity between PLA and PPC, the two are partially blended, so that the modification effect after blending is not obvious

Method used

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  • A kind of pla/ppc/hbp derivative blend and preparation method thereof
  • A kind of pla/ppc/hbp derivative blend and preparation method thereof
  • A kind of pla/ppc/hbp derivative blend and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The synthesis of embodiment 1 long chain branch type hyperbranched polyester (HBP derivative)

[0040] Step 1. Synthesis of HBPE

[0041] The HBPE with TMP as the core is synthesized by melt polycondensation "one-step method". The synthetic reaction schematic diagram is shown below. The specific reaction steps are: add 42.21gDMPA, 2.01gTMP, and 25mgP-TSA to the three-necked flask, and put the reflux condenser, thermometer Connect the stirrer to the three-necked flask respectively, and then put it into the oil bath, first heat the oil bath to 120°C, preheat for 10 minutes and then raise the temperature to 140°C, start timing when the reactants are completely melted, nitrogen protection Lower reaction 2.5h; Then use circulating water pump decompression (100Pa) after reaction 2.0h, stop reaction, the reaction product is poured out from the flask quickly, after it cools down, become hard and brittle translucent solid, the product Place in the oven to dry and set aside.

...

Embodiment 2

[0050] The synthesis of embodiment 2 long chain branch type hyperbranched polyester (HBP derivative)

[0051] Step 1. Synthesis of HBPE

[0052] The HBPE with TMP as the core is synthesized by the "one-step method" of melt polycondensation. The synthetic reaction schematic diagram is shown below. g trimethylolpropane (TMP) and 25mg p-toluenesulfonic acid (P-TSA); the agitator, reflux condenser, and thermometer are respectively connected to a three-necked flask, then it is put into an oil bath, and firstly preheated to 120°C, warm up to 135°C after preheating for 10 minutes, start timing when the reactants in the flask are completely melted, and react at normal pressure for 3 hours under the protection of nitrogen; Pour it out from the flask, and after cooling, a translucent solid is obtained which is the target product.

[0053]

[0054]

[0055] R2 is:

[0056] Step 2. Synthesis of HBP derivatives

[0057] Add 20g of HBPE to the three-necked flask, put it into an ...

Embodiment 3

[0061] The synthesis of embodiment 3 long-chain branched type hyperbranched polyester (HBP derivative)

[0062] Step 1. Synthesis of HBPE

[0063] The HBPE with TMP as the core is synthesized by melt polycondensation "one-step method". The synthetic reaction schematic diagram is shown below. g trimethylolpropane (TMP) and 25mg p-toluenesulfonic acid (P-TSA); the agitator, reflux condenser, and thermometer are respectively connected to a three-necked flask, then it is put into an oil bath, and firstly preheated to 120°C, warm up to 145°C after preheating for 10 minutes, start timing when the reactants in the flask are completely melted, and react for 2 hours under normal pressure under the protection of nitrogen; then react for 3 hours under reduced pressure (95Pa) with a water pump, stop the reaction, and transfer the molten product from the flask Poured out, after cooling, a translucent solid was obtained which was the target product.

[0064]

[0065] R2 is:

[0066]...

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Abstract

The invention discloses a PLA / PPC / HBP (poly lactic acid / propylene oxide copolymer / hyperbranched polymer derivative blend and a preparation method thereof. The preparation method includes that PLA resin, PPC resin and an HBP derivative are mixed for melt blending prior to cooling to indoor temperature to obtain the PLA / PPC / HBP derivative blend, and the chemical formula of the HBP derivative is as described in the formula I. The PLA / PPC / HBP derivative blend is prepared by adopting a melt-blending method, and breaking elongation of the blend is increased; when the addition amount of the HBP derivative is 2.0wt.%, the breaking elongation of the PLA / PPC / HBP derivative blend is increased by 367% under the condition that the tensile strength is essentially constant as compared with the pure PLA / PPC resin; delta Tg of PLA and PPC is decreased by 18.9DEG C to 15.69DEG C.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a PLA / PPC / HBP derivative blend and a preparation method thereof. Background technique [0002] With the decrease of global petroleum resources, the greenhouse gas emissions from petrochemical production make the greenhouse effect more and more serious. The development and utilization of environmentally friendly materials have been widely valued. Polylactic acid (PLA) can be produced by fermentation of non-grain corn and other biological materials, and does not depend on limited petroleum resources. At the same time, its biodegradability greatly reduces the pollution to the environment after being discarded. In terms of material properties, PLA has high tensile strength, but extremely poor toughness, which limits its application after molding. [0003] Carbon dioxide-propylene oxide copolymer (PPC) is a degradable polymer material that consumes CO during its synthesis 2 , effec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L69/00C08L87/00C08G83/00
CPCC08G83/005C08G83/006C08L67/04C08L2205/03C08L2205/06C08L2205/08C08L69/00C08L87/00
Inventor 靳玉娟康凯尔翁云暄司马阳阳
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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