Chain extender for polyamide preparation through chain extending
A technology of chain extender and polyamide, applied in the field of chain extender, can solve the problems affecting the spinnability of slices, material gel, etc., and achieve the effect of good spinnability, stable amino content and high dyeing uniformity
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Example Embodiment
[0022] Example 1
[0023] According to the chain extender of this embodiment, it was prepared by the following steps: 10kg polymethyl methacrylate (density 1.19kg / dm 3 ,Light transmittance is 99%, impact strength ≥16kg / cm 3 , Tensile strength ≥61kg / m 3 , Thermal deformation temperature ≥78℃, thermal softening temperature ≥105℃) and 0.1kg of styrene in a stainless steel reactor equipped with a stirrer, condenser and temperature control device and protected by nitrogen, and react for 3 hours at a temperature of 110℃ The obtained copolymer is the chain extender.
[0024] The physical properties of the chain extender are as follows: the appearance is a transparent block; the number average molecular weight is 6200; the glass transition temperature is 54° C.; the weight percentage of styrene is 0.7%.
Example Embodiment
[0025] Example 2
[0026] According to the chain extender of this embodiment, it was prepared by the following steps: 9kg polymethyl methacrylate (density 1.19kg / dm 3 ,Light transmittance is 99%, impact strength ≥16kg / cm 3 , Tensile strength ≥61kg / m 3 , Thermal deformation temperature ≥ 78 ℃, thermal softening temperature ≥ 105 ℃) and 0.2 kg of styrene in a stainless steel reactor equipped with a stirrer, condenser and temperature control device and nitrogen protection, at a temperature of 110 ℃, reaction for 2 hours The obtained copolymer is the chain extender.
[0027] The physical properties of the chain extender are as follows: the appearance is a transparent block; the number average molecular weight is 6300; the glass transition temperature is 54° C.; the weight percentage of styrene is 1.1%.
Example Embodiment
[0028] Example 3
[0029] According to the chain extender of this embodiment, it is prepared by the following steps: 8kg of polymethyl methacrylate, 0.5kg of styrene and 0.2kg of maleic anhydride are equipped with a mixer, a condenser and a temperature control device and protected by nitrogen. In the stainless steel reactor, the copolymer is obtained by reacting at 110°C for 3 hours, which is the chain extender.
[0030] The physical properties of the chain extender are as follows: the appearance is a transparent block; the number average molecular weight is 6700, the glass transition temperature is 52°C, wherein the weight percentage of styrene is 0.9%, and the weight percentage of maleic anhydride Is 3%.
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