Nylon was developed, but it was only made in the laboratory. From the launch of nylon to industrial production, DuPont, the United States spent two years and spent a lot of manpower and financial resources.

But from Yang Tianfeng, taking the ideology without hesitation makes this industrialization process simple and easy to implement.

When she arrived at the coal chemical plant, Zhao Yurou did not resist the job of sending red envelopes, which was also her expression of her recognition of her identity. Yang Tianfeng convened the factory director Yuan Chunlin and several engineers to listen to work reports in the office, formulate next year's plan, and discuss the separation of the nylon industry and preparations for large-scale production.

According to Yang Tianfeng's ideas and plans, the coal chemical plant continues to launch new products, but it does not take over the big deal and produces all of them themselves, but provides technical support and pushes the industry to private enterprises. Only by getting rid of too much work can the coal chemical plant always innovate and take the lead in technology.

The work report, the plan will be successfully passed next year. When the topic turned to nylon, Zhao Yurou and Hao Jiaqi walked in. Hao Jiaqi smiled, while Zhao Yurou's face turned red. Seeing Yang Tianfeng, she couldn't help but give him anger. It was obvious that she was teased by Hao Jiaqi, and she felt ashamed and annoyed.

Yang Tianfeng didn't care, and smiled and pointed, signaling them to sit down and continue listening to the engineer's narration.

"The raw materials for nylon produced in the laboratory are made of hexadiene and adipic acid, which is expensive and difficult to make. If this problem is not solved, large-scale production will be impossible." Engineer Luo Caisheng obviously participated in the laboratory production and has a good understanding of this.

The raw materials needed to produce polyamide 66 - adipic acid and hexanediamine were only used as reagents in the laboratory at that time. If it was to be used as industrial raw materials, large-scale and affordable adipic acid and hexanediamine were developed and produced. This was a problem in others' eyes, but DuPont has solved it, and Yang Tianfeng can use it.

Although by 1940, nylon fiber products had begun to spread across the United States, and nylon was used in industry as gears, bearings and medical sutures, the production technology was still confidential and seemed very profound.

"To achieve large-scale production, two problems need to be solved: one is the source of industrialization of raw materials; the other is the development of production technology and equipment for melt wire spinning." Yang Tianfeng showed great confidence and stretched out his index finger to lightly in the air. This has become his habitual action. "I will hand it over to the arsenal to develop production technology and equipment to use their machinery and equipment to manufacture. The industrialization of raw materials-" He took out a few pieces of paper from his pocket, all of which were a little wrinkled, picked it up, took out one, patted it, and said: "This is the process, time is rushed and not written completely enough, let's study it first."

Zhao Yurou looked at Yang Tianfeng taking out the wrinkled paper, then frowned and rolled her eyes. After Yang Tianfeng finished speaking, she couldn't help but walk over and stroked the information she seemed very precious on the table twice, pasted it a little flat, and gave Yang Tianfeng a blank look, "Can't you put the documents and materials well? They make them like waste paper, and others throw them away when they see it."

"Yes, you're right." Yang Tianfeng nodded with a smile, "Write it when you think of it, you can write everything in a mess. Just take a look at it and it will be like this."

Hao Jiaqi laughed out loud, which made Zhao Yurou roll his eyes. She immediately became honest, got up and took the paper from Zhao Yurou, and copied the things on it on a small blackboard.

"Why use phenol?" Everyone here is a professional, and someone immediately saw the key.

"Yes, use relatively cheap and easy-to-made phenol as raw material, and use new catalytic technology to produce large batches of adipic acid at appropriate prices, and then use adipic acid to produce hexadiene." Yang Tianfeng explained: "This involves new catalytic technology and new processes, and it must first be successful in the laboratory."

"Is this a process that has been proven to be feasible?" Zhao Yurou sat next to Yang Tianfeng, smoothed the wrinkled paper one by one, folded it, but stared at the small blackboard, and asked questions in a timely manner.

"Yes, this is a technology that DuPont has matured." Yang Tianfeng nodded and said, "So, it's not considered a new technology or a new technology. You can earn millions of dollars by selling nylon stockings. It's really bad."

Someone coughed, some people were focused, Zhao Yurou touched Yang Tianfeng gently, meaning not to show off, there seems to be nothing new to you, but this is the first time you have heard of it!

"Haha, this-" Yang Tianfeng looked at Zhao Yurou, laughed dryly, and said: "Of course, the emergence of nylon is a major breakthrough in the synthetic fiber industry and an important milestone in polymer chemistry. It is not easy for DuPont to spend more than ten years conducting basic research!"

"As a discipline, polymer chemistry seems to be controversial in the chemistry community, and there is no completely certain theory as a basis. It is still basically an empiricist development." Professor Hao said in contemplation: "Nylon as a practice is indeed of great significance."

"Staudinger's scientific concept of polymers having repeated chain link structure is correct. Combined with chain reaction theory and organic radical chemistry, polymer synthesis has a relatively convenient and feasible method." Yang Tianfeng smiled helplessly, "If it is a peaceful time, of course, you can conduct in-depth research on this theory. Now, it can only be pragmatism that is eager for quick success and instant benefits, but having correct theoretical guidance is also a solid foundation."

"You can give a brief explanation. Uncle Hao can study theories in depth, and everyone can also increase their knowledge." Zhao Yurou said, "Developing this and testing that is based on your information. You know the reason but not the reason. Isn't that good, right?"

Yang Tianfeng lowered his eyelids and subconsciously looked at his watch.

"I'll eat here at noon, and the food is quite delicious." Zhao Yurou keenly noticed Yang Tianfeng's small movements and spoke first to block Yang Tianfeng's excuse.

If a woman pays attention to you, she may be better than a magnifying glass. Yang Tianfeng glanced at Zhao Yurou, smiled slightly, and gave a brief explanation of polymer chemistry.

Zhao Yurou listened carefully like others, and from time to time he betted his gentle eyes on Yang Tianfeng's face, with the expression on her face pride and pride.

"We conduct the experiment overnight-" After the explanation, Yuan Chunlin spoke in a hurry, but before he finished speaking, he was stopped by Yang Tianfeng.

"Don't be so anxious. It's the New Year, everyone can relax." Yang Tianfeng said with a smile: "Didn't you also organize some entertainment activities? You have to participate."

"There are not many prizes!" Hao Jiaqi blinked her eyes narrowly.

"Then buy it!" Yang Tianfeng said generously: "I'll pay the money."

"Thank you Director Yang, thank you Madam." Hao Jiaqi shouted exaggeratedly. This title made Zhao Yurou feel embarrassed and angry, and she stared at her bad friend fiercely.

…………………

The gloomy clouds rolled bigger and thicker, covering the last hazy moonlight.

There was a rumbling sound behind him. Guo Songlin put down his telescope and looked back and saw that it was the soldiers who pushed several local chariots up.

The earth tank is made of two thick wooden boards, rectangular, as big as three square tables, with sand and soil filled in the middle of the two wooden boards. Outside, several wet quilts are tied with iron wire, and four ox wheels are placed below, and several strong soldiers are pushed inside. The game is a few hundred kilograms in total, so it rumbling when walking, which is very majestic.

"The troops have entered the position, and I'll wait for your order." Lu Peng, the commander of the Independent Brigade, ran over and said in a low voice.

After looking at the watch, it was less than half an hour before Guo Songlin nodded and said solemnly: "The attack should be fierce at the beginning, lay down the bunkers, break through the trenches, open the opening for the infiltration troops and defend on the spot, and hold the enemy's reinforcements firmly."

"Don't worry, Master." Lu Peng smiled coldly at the stronghold in the distance, "I am sure to take this place within three hours."

"Well! I believe this." Guo Songlin patted Lu Peng's shoulder with admiration, "However, if we can do something, try to fight as much as possible, and cherish the lives of the soldiers."

"I know." After the war, Lu Peng, who was promoted to the commander of the independent brigade, has become more calm and mature.

At about 7 o'clock in the evening, a red signal flare rose into the dark sky and the attack began.

"Bang, bang, bang..." After sporadic gunfire, all the searchlights on the artillery tower were knocked out, and the surrounding area was dark.

Dada da... First, a gun tower spewed out flames, and then more and more guns were fired. In the night, the shooting mouth of the gun tower was like a demon's eyes, blinking red.

With a loud bang, the artillery tower was surrounded by huge fire and smoke. The gunshot stopped immediately, and the smoke dissipated. You could see that the artillery tower had collapsed.

Recoilless cannons were approved for use by Yang Tianfeng as a practical drill. However, the number was not large, and the main weapons for attacking were infantry artillery and war defense artillery.

A scattered line rushed up quickly in the rain of bullets and lay down in front of the trench. The machine guns and rifles fired together to suppress the enemy's firepower.

The heavy earthen chariot drove in, and behind them were several flatbed vehicles. With the cover of the earthen chariot, they poured the large and small straw bales and wooden boxes into the trench and pushed them back quickly. After a few rounds and turns, the trench had been filled with a five- or six-meter-wide passage.

The attack point is on both sides of the suspension bridge. After a breakthrough is reached, the soldiers will detour towards the suspension bridge. A company is ambushed in the depression in front of the suspension bridge. Once the suspension bridge is lowered, soldiers outside will flock in.

Pa, pa, pa, a few flares flew up in the air, and the soldiers hurriedly fell to the ground. The pre-war drills saw the effect at this time. The various units cooperated tacitly and the soldiers responded quickly.

The light and heavy mortars began to bombard the enemy's positions through the trench. After the deafening explosion, a large amount of smoke rose. The soldiers of the commando immediately moved, and the soldiers rushing in front were carrying big axes and wearing heavy cotton coats. They rushed to the barbed wire and yelled to cut off the barbed wire. The follow-up troops rushed in immediately.

In a short time, the Japanese reacted. A group of Japanese and puppet troops rushed over with howling, trying to suppress the opponents who rushed over.

"Bang!" With an inadvertent gunshot, the leading Japanese officer fell to the ground. The enemies were stunned for a moment, and howled and shot wildly. More than a dozen soldiers who had crossed the deep ditch were killed and injured, or simply fell into the deep ditch.

"Dadada..." The machine gun responsible for cover fired violently, and the enemy fell to the ground like a heavy wood after being hit.

In the darkness, an officer was shouting loudly: "Run! Rush over!" "Firepower suppression!" "Fire cover"...

In the explosion of fire, soldiers kept falling under the flying bullets, but they still relied on their firepower and number advantages to approach the suspension bridge stubbornly. The artillery pushed infantry artillery and combat defense artillery, and with the courageous spirit of "bayonets on cannons", bombarded the enemy's positions and fire points at close range.

The bending mortar fire is even more intense, and the 120 and 82 mortars hit the enemy with the shells that hit the head and face. In order to pursue effect and saving, only some of the shells with a heavy 120 are equipped with counter-throwing rings, becoming air bombs. The result of this is to greatly increase the reliability of the shells. Even on the ground with thin snow, they can bounce up to one or two meters high, which can effectively trigger the delayed fuse. This time, Yang Tianfeng also pulled out a certain number of shells.

The powerful power of the air bomb shells when they exploded in the air, the Japanese and puppet troops were particularly panicked. Unpredictable, a large number of enemies were killed and injured by such shells with almost no dead corners. Some of the lying enemies had no chance to get up, and wounds hit by shrapnel appeared on the back of their heads and backs.

In the complex wars, inconspicuous gunfire sounds from time to time. The enemy's machine gun shooters and officers are frequently shot and killed, sometimes without command, and chaos is inevitable.

"Boom, boom!" After two loud bangs, the iron chain of the suspension bridge was broken by a grenade and fell down shakingly.

"Run!" An officer jumped up from the ground and waved his hand, "Kill the Japanese!"

"Run!" "Kill!" The soldiers hiding outside the suspension bridge roared and jumped up suddenly, rushing towards the suspension bridge quickly...

Taking advantage of the main attack point to attract the attention of the enemy, another unit climbed over the trench from a distance with a ladder and suddenly launched an attack. After destroying several bunkers with steel fists and recoilless cannons one after another, stabbed the enemy hard on the side of the entire stronghold group.

At around 10 o'clock in the evening, the enemy's artillery towers and bunkers were all destroyed under the attack of various attack weapons. One Japanese who strengthened the squadron and the puppet troops of the two battalions were basically wiped out, and only a few enemies fled.

The attacking troops defended on the spot in both east and west directions, resisting the enemy coming to aid. The 25th Division, which infiltrated the battle, entered the breakthrough point from the breakthrough point, and made rapid progress in the depth of the enemy-occupied area in regiments. At the same time, more than 2,000 people were divided into companies and penetrated into the villages of Fengxian County.

At this point, the prelude to the North's movement was opened, the breakthrough infiltration was declared successful, and the plan for a major counterattack began to unfold.
Chapter completed!